CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 129,339	$ 135,646
Restricted cash	300	300
Accounts receivable, net of allowances of $660 and $655 as of June 30, 2025 and December 31, 2024, respectively	3,466	4,214
Inventories	6,133	7,475
Prepaid expenses and other current assets	4,874	5,210
Total current assets	144,112	152,845
Property and equipment, net	7,526	7,694
Operating lease right-of-use assets	1,395	2,000
Other assets	843	686
Total assets	153,876	163,225
Current liabilities:
Accounts payable	1,809	2,746
Operating lease liabilities	895	852
Accrued compensation and related benefits	792	862
Accrued income taxes payable	1,223	1,173
Other accrued expenses and liabilities	1,923	2,327
Total current liabilities	6,642	7,960
Long-term operating lease liabilities	790	1,167
Other long-term liabilities	29	29
Total liabilities	7,461	9,156
Commitments and contingencies (see Note 14)
Stockholders' equity:
Common stock, $0.001 par value: 50,000 shares authorized; 26,307 and 25,974 shares issued and 23,658 and 23,431 shares outstanding as of June 30, 2025 and December 31, 2024, respectively	26	26
Additional paid-in capital	511,185	509,482
Treasury stock, 2,649 and 2,543 shares as of June 30, 2025 and December 31, 2024, respectively	(16,844)	(16,490)
Accumulated deficit	(350,881)	(340,050)
Accumulated other comprehensive income	2,924	1,096
Total stockholders' equity	146,415	154,069
Total liabilities and stockholders' equity	153,876	163,225
Series B Convertible Preferred Stock
Stockholders' equity:
Series B convertible preferred stock, $0.001 par value: 5,000 shares authorized; 5,000 shares issued and outstanding as of June 30, 2025 and December 31, 2024	$ 5	$ 5