Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents, including restricted cash of $152 for both periods presented	$ 27,325	$ 20,441
Inventories	14,525	14,677
Prepaid expenses and other assets	2,450	2,967
Total current assets	49,534	46,567
Leasehold improvements and equipment, net	2,137	2,799
Intangible assets, net	510	671
Right-of-use assets	2,400	3,523
Other long-term assets	383	497
Total assets	54,964	54,057
Current liabilities
Accounts payable	10,232	9,679
Accrued expenses	9,493	7,337
Current maturities of operating lease obligations	691	680
Current maturities of finance lease obligations	11	16
Customer deposits	195	157
Total current liabilities	20,622	17,869
Deferred revenue	3,311	3,955
Operating lease obligations, less current maturities	2,563	3,539
Finance lease obligations, less current maturities	12	22
Total liabilities	26,508	25,385
Commitments and Contingencies (Notes 10 and 16)
Stockholders' Equity
Common stock, $0.001 par value; authorized 150,000 shares; 74,981 shares and 74,567 shares issued and outstanding at December 31, 2023 and December 31, 2022, respectively.	75	74
Additional paid-in capital	218,845	214,094
Accumulated deficit	(190,460)	(185,493)
Cumulative translation adjustments	(4)	(3)
Total stockholders' equity	28,456	28,672
Total liabilities and stockholders' equity	54,964	54,057
Nonrelated Party
Current assets
Trade receivables, net of allowances of $68 and $122, respectively; Including receivables from Related Party of $2.8 million and $3.1 million, respectively.	$ 5,234	$ 8,482