| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 |
|---|---|---|---|---|---|---|---|---|
Operating activities | ||||||||
Operating activities | ||||||||
Net loss | ||||||||
-40,696 | -77,400 | -43,562 | -47,089 | -45,581 | -50,038 | -29,281 | -17,708 | -10,932 |
Adjustments to reconcile net loss to net cash used in operating activities: | ||||||||
Stock-based compensation expense | ||||||||
17,458 | 11,475 | 11,369 | 9,038 | 6,278 | 4,926 | 1,145 | 745 | 243 |
Depreciation and amortization | ||||||||
4,919 | 4,070 | 3,354 | 2,977 | 2,377 | 1,590 | 1,990 | 1,947 | 1,454 |
Payment of accrued interest of long-term debt | ||||||||
0 | 5,446 | 0 | 0 | - | - | - | - | - |
Revaluation of preferred stock warrant liability | ||||||||
- | - | - | - | - | - | -1,156 | 387 | 73 |
Amortization of debt discount | ||||||||
- | - | - | - | - | - | - | 136 | 330 |
Gain (Loss) on Extinguishment of Debt | ||||||||
0 | -842 | 0 | 0 | - | -581 | 0 | 0 | - |
Interest accrued on convertible promissory notes | ||||||||
- | - | - | - | - | - | - | - | -87 |
Amortization of deferred financing costs | ||||||||
810 | 438 | 171 | 158 | 18 | -348 | -259 | 90 | - |
Gain on sale of business | ||||||||
49,922 | 0 | 0 | - | - | - | - | - | - |
Loss on equity securities | ||||||||
625 | 0 | 0 | - | - | - | - | - | - |
Amortization of premium on short-term investments | ||||||||
204 | -278 | -198 | 20 | -270 | -86 | 518 | 0 | - |
Non-cash operating lease cost | ||||||||
2,831 | 0 | 0 | - | - | - | - | - | - |
Conversion of accrued interest to long-term debt | ||||||||
2,193 | 1,530 | 1,472 | 1,357 | 1,067 | 420 | 0 | 0 | - |
Loss on disposal of property and equipment | ||||||||
-1,152 | -97 | -15 | 2 | -3 | 0 | -1 | -3 | - |
Provision for bad debts | ||||||||
-62 | 467 | 361 | 0 | 34 | 0 | 0 | - | - |
Provision for inventory obsolescence | ||||||||
931 | 691 | 866 | 822 | 248 | - | - | - | - |
Gain on sale of investments | ||||||||
- | - | - | - | - | 5 | 0 | 0 | - |
Changes in operating assets and liabilities: | ||||||||
Accounts receivable | ||||||||
9,805 | -1,807 | -2,277 | 2,476 | 7,328 | 4,109 | 5,009 | 210 | 965 |
Inventory | ||||||||
8,475 | -5,251 | 8,742 | 5,857 | 5,602 | 1,252 | 1,370 | 1,884 | 1,338 |
Prepaid expenses and other assets | ||||||||
3,350 | 2,714 | 1,278 | -109 | -1,199 | 2,132 | 1,679 | -221 | 1,100 |
Other assets | ||||||||
- | - | - | - | 7 | 70 | 268 | -118 | 58 |
Accounts payable | ||||||||
-599 | 4,640 | -110 | 869 | -166 | 21 | 1,601 | 103 | -1,231 |
Accrued liabilities | ||||||||
1,276 | -494 | 1,312 | -40 | -80 | 3,379 | 2,678 | 1,830 | 781 |
Accrued compensation and other employee benefits | ||||||||
3,567 | 3,463 | 295 | 281 | 1,242 | - | - | - | - |
Customer deposits | ||||||||
-1,778 | -778 | 8,335 | 610 | 0 | - | - | - | - |
Deferred revenue | ||||||||
-6,536 | -1,779 | -29,161 | 29,948 | -127 | 9,497 | 1,025 | 146 | 624 |
Operating lease liabilities | ||||||||
-2,506 | 0 | 0 | - | - | - | - | - | - |
Deferred rent and other liabilities | ||||||||
0 | -503 | 1,171 | 3,236 | 2,793 | -607 | 764 | 732 | -1,486 |
Net cash used in operating activities | ||||||||
-89,421 | -54,065 | -51,657 | -6,079 | -43,362 | -38,061 | -31,346 | -14,808 | -10,692 |
Investing activities | ||||||||
Investing activities | ||||||||
Purchases of property and equipment | ||||||||
7,885 | 4,485 | 4,284 | 3,991 | 3,796 | 1,900 | 759 | 428 | 2,688 |
Proceeds from sale of business | ||||||||
40,000 | 0 | 0 | - | - | - | - | - | - |
Proceeds from sale of property and equipment | ||||||||
- | - | - | 4 | 6 | 0 | 0 | - | - |
Proceeds from sale of short-term investments | ||||||||
2,500 | 7,910 | 3,600 | 4,700 | 3,000 | 4,500 | 0 | 0 | - |
Proceeds from maturity of short-term investments | ||||||||
97,970 | 51,300 | 79,599 | 34,800 | 57,309 | 35,977 | 0 | 0 | - |
Purchases of short-term investments | ||||||||
147,744 | 77,650 | 81,405 | 65,774 | 32,750 | 62,911 | 32,175 | 0 | - |
Decrease in restricted cash | ||||||||
- | - | - | - | - | -59 | 21 | 0 | 112 |
Net cash provided by investing activities | ||||||||
-15,159 | -22,925 | -2,490 | -30,261 | 23,769 | -24,275 | -32,955 | -428 | -2,800 |
Financing activities | ||||||||
Proceeds from issuance of preferred stock and warrants | ||||||||
- | - | - | - | - | - | - | 15,132 | 14,883 |
Repurchase of shares related to common stock warrant exercise | ||||||||
- | - | - | - | - | 94 | 0 | 0 | - |
Financing activities | ||||||||
Proceeds from issuance of 2025 convertible senior notes | ||||||||
20,000 | 60,000 | 0 | 5,000 | 10,000 | 30,000 | 5,000 | 13,000 | 5,004 |
Fees paid for issuance of 2025 convertible senior notes | ||||||||
100 | 500 | 0 | 0 | - | 770 | 0 | 0 | - |
Repayment of long-term debt | ||||||||
0 | 45,000 | 58 | 226 | 271 | 18,214 | 211 | 1,706 | 4,899 |
Proceeds from sale of common stock, net | ||||||||
68,273 | 53,829 | 56,486 | 26,223 | 12,518 | - | - | - | - |
Proceeds from issuance of common stock warrants | ||||||||
2,228 | 3,010 | 674 | 0 | 0 | - | - | - | 5,000 |
Deferred financing costs | ||||||||
- | - | - | - | 152 | 0 | 0 | 553 | - |
Tax withholdings related to net share settlements of restricted stock units | ||||||||
1,474 | 207 | 313 | 0 | 0 | - | - | - | - |
Proceeds from sale of common stock, net | ||||||||
- | - | - | - | - | 57,015 | 47,374 | 0 | - |
Proceeds from exercise of common stock warrants | ||||||||
- | - | - | - | 2 | 230 | 0 | 0 | - |
Proceeds from issuance of common stock for employee stock purchase plan | ||||||||
1,952 | 1,451 | 1,793 | 1,489 | 1,295 | 988 | 0 | 0 | - |
Proceeds from exercise of stock options | ||||||||
18,387 | 3,507 | 1,086 | 2,607 | 876 | 411 | 387 | 187 | 6 |
Net cash provided by financing activities | ||||||||
109,266 | 75,081 | 59,668 | 35,093 | 24,268 | 69,566 | 52,550 | 26,060 | 19,994 |
Net increase (decrease) in cash and cash equivalents | ||||||||
4,686 | -1,909 | 5,521 | -1,247 | 4,675 | 7,230 | -11,751 | 10,824 | 6,502 |
Effect of exchange rate changes on cash and cash equivalents | ||||||||
-9 | -14 | 32 | -26 | -42 | 52 | 0 | 0 | - |
Supplemental disclosures | ||||||||
Cash paid for interest | ||||||||
5,683 | 6,213 | 4,416 | 4,071 | 2,844 | 3,479 | 1,474 | 563 | 167 |
Fair value of warrants issued with long-term debt | ||||||||
968 | 1,583 | 0 | 0 | - | - | - | - | - |
Cash paid for taxes | ||||||||
265 | 231 | 154 | 217 | 69 | 0 | 0 | - | - |
Purchases of property and equipment, accrued but not paid | ||||||||
- | - | - | 275 | 640 | 0 | - | - | - |
Accrual of construction costs for leasehold improvements | ||||||||
- | - | - | - | - | - | 0 | - | - |
Rental instruments reclassified from inventory | ||||||||
605 | 585 | 1,023 | 801 | 772 | 2,541 | 0 | 0 | - |
Operating lease right-of-use assets obtained in exchange for lease obligations | ||||||||
28,060 | 0 | 0 | - | - | - | - | - | - |
Common stock received for sale of a business | ||||||||
9,893 | 0 | 0 | - | - | - | - | - | - |
Non-cash inventory exchanged for services | ||||||||
0 | 106 | 0 | 28 | 112 | 0 | 0 | - | - |
Non-cash capital lease | ||||||||
- | - | - | - | 48 | 262 | 410 | 0 | - |
Accrual of offering costs | ||||||||
- | - | - | - | 29 | 0 | 29 | 1,212 | - |
Accretion of preferred stock | ||||||||
- | - | - | - | - | - | 4,653 | 7,533 | 5,251 |
Issuance of preferred stock warrants with debt | ||||||||
- | - | - | - | - | - | 138 | 648 | 661 |
Issuance of preferred stock warrants with equity | ||||||||
- | - | - | - | - | - | - | - | 1,867 |
Conversion of convertible preferred stock to common stock | ||||||||
- | - | - | - | - | - | - | - | 5,087 |