CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 26,299	$ 63,419
Short-term investments	77,785	83,560
Accounts receivable, net of allowance for doubtful accounts of $305 and $264, respectively	16,453	14,246
Inventory	16,852	11,498
Prepaid expenses and other current assets	1,791	3,143
Total current assets	139,180	175,866
Property and equipment, net	14,449	8,992
Operating lease right-of-use assets	4,251	5,248
Other non-current assets	385	400
TOTAL ASSETS	158,265	190,506
Current liabilities:
Accounts payable	4,613	3,198
Accrued liabilities and other	11,156	12,353
Current portion of long-term borrowings	1,458	0
Operating lease liabilities, current portion	1,337	1,339
Total current liabilities	18,564	16,890
Long-term borrowings	33,667	34,973
Operating lease liabilities, net of current portion	3,175	4,166
Other long-term liabilities	31	57
TOTAL LIABILITIES	55,437	56,086
Commitments and contingencies (Note 6)
STOCKHOLDERS’ EQUITY
Preferred stock, $0.0001 par value; 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.0001 par value; 100,000,000 shares authorized; 34,439,309 and 33,674,085 shares issued and outstanding, respectively	3	3
Additional paid-in capital	448,598	429,914
Accumulated other comprehensive income	157	352
Accumulated deficit	(345,930)	(295,849)
TOTAL STOCKHOLDERS’ EQUITY	102,828	134,420
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 158,265	$ 190,506