CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
CURRENT ASSETS
Cash and cash equivalents	$ 20,717	$ 63,419
Short-term investments	76,573	83,560
Accounts receivable, net of allowance for credit losses of $400 and $264, respectively	20,674	14,246
Inventory	17,282	11,498
Prepaid expenses and other current assets	2,365	3,143
Total current assets	137,611	175,866
Property and equipment, net	15,564	8,992
Operating lease right-of-use assets	4,002	5,248
Other non-current assets	375	400
TOTAL ASSETS	157,552	190,506
CURRENT LIABILITIES
Accounts payable	6,279	3,198
Accrued liabilities and other	13,511	12,353
Operating lease liabilities, current portion	1,388	1,339
Total current liabilities	21,178	16,890
Long-term borrowings	35,171	34,973
Operating lease liabilities, net of current portion	2,871	4,166
Other long-term liabilities	30	57
TOTAL LIABILITIES	59,250	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; 34,731,577 and 33,674,085 shares issued and outstanding, respectively	3	3
Additional paid-in capital	455,172	429,914
Accumulated other comprehensive income	232	352
Accumulated deficit	(357,105)	(295,849)
TOTAL STOCKHOLDERS’ EQUITY	98,302	134,420
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 157,552	$ 190,506