| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | ||
|---|---|---|---|---|---|---|
Subsidiary Or Equity Method Investee Sale Of Stock By Subsidiary Or Equity Investee [Table] | ||||||
Subsidiary Sale Of Stock [Line Items] | ||||||
Cash flows from operating activities: | ||||||
Net loss | ||||||
-60,461 | -51,979 | -64,806 | -22,414 | -13,160 | ||
Adjustments to reconcile net loss to cash used in operating activities: | ||||||
Non-cash research and development expense | ||||||
- | - | 25,861 | - | 4,011 | ||
Common stock issuance for separation agreement | ||||||
- | - | - | - | 381 | ||
Stock-based compensation expense | ||||||
5,205 | 7,063 | 6,397 | 3,641 | 1,457 | ||
Depreciation and amortization expense | ||||||
255 | 141 | 80 | 56 | 11 | ||
Loss on disposal of intangible assets | ||||||
- | -4 | - | - | - | ||
Change in accrued interest and accretion of discount on short-term investments | ||||||
-29 | -1 | - | - | - | ||
Change in operating assets and liabilities: | ||||||
Prepaid expenses and other current assets | ||||||
-224 | 1,305 | 793 | -58 | 279 | ||
Deferred transaction costs | ||||||
- | - | 229 | -229 | - | ||
Security deposit | ||||||
-13 | -33 | -36 | -362 | -38 | ||
Related party receivable | ||||||
531 | - | - | - | - | ||
Long-term prepaid expenses | ||||||
-2,438 | 2,192 | 604 | - | - | ||
Other assets | ||||||
- | - | - | 28 | - | ||
Accounts payable | ||||||
-653 | 1,649 | 1,076 | 186 | 591 | ||
Accrued expenses | ||||||
2,177 | 1,093 | 1,118 | 1,238 | 1,608 | ||
Related party payable | ||||||
297 | - | - | - | - | ||
Due from/ to related parties | ||||||
- | - | -7 | -50 | 69 | ||
Net cash used in operating activities | ||||||
-51,090 | -45,558 | -31,469 | - | - | ||
Cash flows from investing activities: | ||||||
Net cash used in operating activities | ||||||
- | - | - | -17,801 | -5,485 | ||
Purchases of short-term investments | ||||||
34,797 | 50,011 | - | - | - | ||
Proceeds from maturities of short-term investments | ||||||
5,000 | 45,000 | - | - | - | ||
Purchase of property and equipment | ||||||
57 | 33 | 38 | 30 | 32 | ||
Software development and other assets | ||||||
186 | 318 | - | - | - | ||
Software development and other assets | ||||||
- | - | 8 | 158 | 24 | ||
Net cash provided by (used in) investing activities | ||||||
-30,041 | -5,363 | -47 | - | - | ||
Cash flows from financing activities: | ||||||
Proceeds from February Offering, net of offering expenses | ||||||
64,120 | - | - | - | - | ||
Proceeds from employee stock purchase plan | ||||||
131 | 174 | - | - | - | ||
Net cash used in investing activities | ||||||
- | - | - | -188 | -56 | ||
Proceeds from initial public offering, net of offering expenses | ||||||
- | - | 69,750 | - | - | ||
Proceeds from issuance of preferred stock, net of issuance costs | ||||||
- | - | - | - | 70,639 | ||
Payments for transaction costs | ||||||
- | - | 3,073 | 13 | - | ||
Proceeds from exercise of options | ||||||
- | 111 | 27 | - | - | ||
Net cash provided by financing activities | ||||||
86,539 | 286 | 66,703 | - | - | ||
Net (decrease) increase in cash and cash equivalents | ||||||
5,407 | -50,635 | - | - | - | ||
Non-cash investing and financing activities: | ||||||
Offering costs in accrued expenses and accounts payable | ||||||
69 | - | - | - | - | ||
Software development and other costs in accrued expenses and accounts payable | ||||||
164 | 60 | - | - | - | ||
Purchase of property and equipment in accounts payable | ||||||
- | 19 | - | - | - | ||
Net cash provided by (used in) financing activities | ||||||
- | - | - | -13 | 70,639 | ||
Net increase (decrease) in cash and cash equivalents | ||||||
- | - | 35,185 | -18,004 | 65,097 | ||
ATM [Member] | ||||||
Proceeds from February Offering, net of offering expenses | ||||||
22,286 | - | - | - | - | ||