Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 14,519	$ 14,907
Accounts receivable, net	12,130	3,776
Inventories	1,759	4,427
Prepaid and other current assets	2,837	2,061
Total current assets	31,245	25,171
Property and equipment, net	605	1,356
Intangibles	146	338
Deposits	75	69
Operating lease right-of-use assets, net	169	1,076
Total assets	32,240	28,010
Current liabilities
Accounts payable and accrued expenses	4,058	2,874
Deferred revenue, current portion	1,172	1,492
Operating lease liabilities, current portion	174	303
Product warranties	508	187
Loan Payable	51
Total current liabilities	5,963	4,856
Loan payable		267
Operating lease liabilities		812
Deferred revenue, net of current portion	262	579
Total liabilities	6,225	6,514
Commitments and contingencies
Stockholders’ equity
Preferred stock, 5,000,000 shares authorized and none issued and outstanding
Common stock, $0.01 par value – 50,000,000 authorized; 16,694,311 issued and 16,617,274 outstanding at December 31, 2021; 16,564,311 issued and 16,491,103 outstanding at December 31, 2020	167	166
Additional paid-in capital	44,115	43,701
Treasury stock, 77,037 and 73,208 shares at cost, at December 31, 2021 and 2020, respectively	(325)	(310)
Accumulated deficit	(17,942)	(22,061)
Total stockholders’ equity	26,015	21,496
Total liabilities and stockholders’ equity	$ 32,240	$ 28,010