Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents, including restricted cash of $0.2 million as of both dates	$ 17,072	$ 28,219
Trade receivables, net of allowances of $54 and $65, respectively; Including receivables from Related Party of: $1.3 million and $2.1 million, respectively	4,228	5,226
Inventories	15,753	13,601
Prepaid expenses and other assets	1,455	1,859
Total current assets	38,508	48,905
Leasehold improvements and equipment, net	2,899	3,003
Intangible assets, net	758	857
Right-of-use assets	3,884	4,352
Other long-term assets	564	723
Total assets	46,613	57,840
Current liabilities
Accounts payable	10,197	10,423
Accrued expenses	6,696	6,481
Current maturities of operating lease obligations	646	528
Current maturities of finance lease obligations	13	20
Customer deposits	173	161
Total current liabilities	17,725	17,613
Deferred revenue	4,228	4,346
Operating lease obligations, less current maturities	3,882	4,154
Total liabilities	25,835	26,113
Commitments and Contingencies (Note 10)
Stockholders' Equity
Common stock, $0.001 par value; authorized 150,000 shares; 68,155 shares and 68,126 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	68	68
Additional paid-in capital	203,798	200,614
Accumulated deficit	(183,090)	(168,953)
Cumulative translation adjustments	2	(2)
Total stockholders' equity	20,778	31,727
Total liabilities and stockholders' equity	$ 46,613	$ 57,840