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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 28,950 $ 34,986
Short-term investments 106,174 50,732
Accounts receivable 16,236 16,882
Inventories 19,460 19,490
Prepaid and other current assets 6,479 6,018
Total current assets 177,299 128,108
Non-current assets:    
Property and equipment, net 14,261 14,898
Goodwill 1,316 1,316
Operating lease right-of-use assets 13,470 14,122
Intangible assets, net   132
Restricted cash 2,522 2,435
Other assets 4,486 4,524
Total assets 213,354 165,535
Current liabilities:    
Accounts payable 19,244 22,185
Accrued liabilities 19,545 20,951
Debt – current 4,982 5,017
Operating lease liabilities – current 1,857 1,613
Deferred product revenue 561 570
Total current liabilities 46,189 50,336
Non-current liabilities:    
Debt – non-current 39,545 39,414
Operating lease liabilities – non-current 17,263 18,406
Other non-current liabilities 1,122 327
Total liabilities 104,119 108,483
Commitments and contingencies
Stockholders' equity:    
Common stock 167 144
Additional paid-in capital 1,003,748 906,905
Accumulated other comprehensive income 907 114
Accumulated deficit (895,587) (850,111)
Total stockholders' equity 109,235 57,052
Total liabilities and stockholders' equity $ 213,354 $ 165,535