Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,825	$ 5,434
Restricted cash	1,361	1,361
Accounts receivable, net of allowance for doubtful accounts of $242 and $382 at March 31, 2023 and December 31, 2022, respectively	3,940	4,471
Inventories	5,695	5,547
Prepaid expenses and other current assets	691	691
Total current assets	14,512	17,504
Property and equipment, net	8,182	7,498
Operating lease right-of-use assets	870	975
Intangible assets, net	16,674	17,394
Goodwill	8,803	8,803
Other assets	82	98
Total assets	49,123	52,272
Current liabilities:
Accounts payable	3,099	3,425
Accrued expenses and other current liabilities	6,549	6,555
Deferred revenues	2,548	2,778
Current portion of operating lease liabilities	381	355
Current portion of contingent consideration	481	313
Total current liabilities	13,058	13,426
Long-term debt, net	7,517	7,476
Deferred revenues and other liabilities	305	314
Deferred tax liability	306	306
Operating lease liabilities, net of current portion	489	610
Contingent consideration, net of current portion	8,127	8,309
Total liabilities	29,802	30,441
Commitments and contingencies (Note 12)
Stockholders' equity:
Series C convertible preferred stock, $0.10 par value; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.001 par value; 150,000,000 shares authorized; 34,881,453 and 34,723,046 shares issued and outstanding at March 31, 2023 and December 31, 2022, respectively	35	35
Additional paid-in capital	249,349	249,024
Accumulated deficit	(230,063)	(227,228)
Total stockholders' equity	19,321	21,831
Total liabilities and stockholders' equity	$ 49,123	$ 52,272