CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 17,598	$ 84,641
Short-term investments	34,213
Accounts receivable, net	3,248	2,516
Inventory	12,653	8,150
Prepaid expenses and other current assets	4,010	3,552
Total current assets	71,722	98,859
Property and equipment, net	2,573	2,366
Operating lease right-of-use assets	2,417	2,746
Intangible assets, net	2,624	2,956
Goodwill	8,454	8,454
Other assets	118	118
Total assets	87,908	115,499
Current liabilities:
Accounts payable	2,355	3,061
Accrued expenses	5,621	4,758
Accrued compensation	3,420	3,376
Operating lease liabilities	1,002	975
Other current liabilities	1,900	2,482
Total current liabilities	14,298	14,652
Operating lease liabilities, net of current	1,380	1,730
Term loan, net of current	26,648	26,496
Other liabilities	548	558
Total liabilities	42,874	43,436
Commitments and contingencies (Note 8)
Stockholders' deficit:
Preferred stock, $0.001 par value; authorized -10,000,000 shares; issued and outstanding - none
Common stock, $0.001 par value; authorized - 500,000,000 shares; issued - 26,615,909 shares as of June 30, 2022 and 26,383,225 shares as of December 31, 2021; outstanding - 26,569,220 shares as of June 30, 2022 and 26,336,536 shares as of December 31, 2021	27	26
Additional paid-in-capital	387,803	384,132
Accumulated other comprehensive loss	(42)
Accumulated deficit	(342,703)	(312,044)
Stockholders' deficit before treasury stock	45,085	72,114
Less: Treasury stock	(51)	(51)
Total stockholders' equity	45,034	72,063
Total liabilities and stockholders' equity	$ 87,908	$ 115,499