CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 6,245	$ 6,120
Restricted cash	5	5
Accounts receivable, net	1,173	1,113
Inventories	878	866
Prepaid expenses and other current assets	168	392
Total current assets	8,469	8,496
Property, plant and equipment, net	423	407
Intangible assets, net	162	195
Right-of-use assets	258	334
Deferred tax assets	526	527
Other assets	65	63
Total assets	9,903	10,022
Current liabilities
Accounts payable	374	235
Accrued liabilities	300	343
Lease liabilities, current	189	219
PPP loan payable		186
Accrued income taxes	65	59
Total current liabilities	928	1,042
Long term liabilities
Lease liabilities, long-term	87	140
Total long-term liabilities	87	140
Total liabilities	1,015	1,182
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock, $0.01 par value: 1,000 shares authorized, no shares issued or outstanding
Common stock, $0.001 par value: 30,000 shares authorized, 6,601 shares issued and outstanding at both June 30, 2021 and December 31, 2020	7	7
Additional paid-in-capital	57,971	57,966
Accumulated other comprehensive income	60	37
Accumulated deficit	(49,150)	(49,170)
Total stockholders' equity	8,888	8,840
Total liabilities and stockholders' equity	$ 9,903	$ 10,022