CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 8,728	$ 10,359
Accounts receivable, net	4,712	3,377
Note receivable	0	100
Inventories	10,000	11,286
Prepaid income taxes	2,411	2,409
Other current assets	911	644
Total current assets	26,762	28,175
Fixed assets, net of accumulated depreciation of $20,124 and $19,979, respectively	1,852	1,950
Note receivable, net of current portion	0	1,584
Right-of-use asset	3,429	3,618
Goodwill	2,621	2,621
Deferred tax assets	3,489	2,939
Intangible assets, net of accumulated amortization of $4,056 and $4,005, respectively	532	583
Other assets	678	777
Total noncurrent assets	12,601	14,072
Total assets	39,363	42,247
Current liabilities:
Accounts payable	1,919	1,691
Accrued liabilities	2,498	3,665
Lease liability	813	837
Deferred revenue	569	504
Total current liabilities	5,799	6,697
Long-term debt	2,173	2,173
Deferred revenue, net of current portion	202	111
Lease liability, net of current portion	2,666	2,864
Other liabilities	160	166
Total noncurrent liabilities	5,201	5,314
Total liabilities	11,000	12,011
Shareholders' equity:
Common stock, $0.01 par value, 20,000,000 shares authorized; 13,010,383 and 12,976,227 shares issued, respectively; 8,965,541 and 8,931,385 shares outstanding, respectively	130	130
Additional paid-in capital	42,816	42,536
Retained earnings	17,512	19,718
Accumulated other comprehensive income (loss), net of tax	15	(38)
Treasury stock, at cost, 4,044,842 shares	(32,110)	(32,110)
Total shareholders' equity	28,363	30,236
Total liabilities and shareholders' equity	$ 39,363	$ 42,247