CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 21,202	$ 28,553
Restricted cash	698	1,254
Accounts receivable, net of allowances of $2,666 and $2,745 as of September 30, 2022 and December 31, 2021, respectively	23,588	19,963
Inventories	25,060	19,924
Prepaid expenses and other current assets	3,908	3,032
Total current assets	74,456	72,726
Property and equipment, net	6,189	4,066
Operating lease right-of-use assets	3,997	2,088
Intangible assets, net	5,533	6,445
Goodwill	10,179	10,268
Other assets	1,046	1,070
Total assets	101,400	96,663
Current liabilities:
Accounts payable	15,074	10,502
Operating lease liabilities	941	1,269
Deferred revenue	2,072	2,153
Accrued compensation and related benefits	2,753	3,150
Other accrued expenses and liabilities	2,917	3,774
Total current liabilities	23,757	20,848
Long-term operating lease liabilities	3,185	938
Long-term deferred revenue	474	280
Other long-term liabilities	24	85
Total liabilities	27,440	22,151
Commitments and contingencies (see Note 15)
Stockholders' equity:
Preferred stock, $0.001 par value: 10,000 shares authorized; 5,000 shares issued and outstanding as of September 30, 2022 and December 31, 2021	5	5
Common stock, $0.001 par value: 50,000 shares authorized; 24,021 and 23,707 shares issued and 22,490 and 22,230 shares outstanding as of September 30, 2022 and December 31, 2021, respectively	24	24
Additional paid-in capital	495,222	492,657
Treasury stock, 1,531 and 1,477 shares as of September 30, 2022 and December 31, 2021, respectively	(12,030)	(11,134)
Accumulated deficit	(409,720)	(408,989)
Accumulated other comprehensive income	459	1,949
Total stockholders' equity	73,960	74,512
Total liabilities and stockholders' equity	$ 101,400	$ 96,663