Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 560	$ 569
Treasury bills	7,488	7,872
Trade receivables, less allowance for doubtful accounts of $8	1,035	689
Inventories	1,517	1,564
Other current assets	130	170
Deferred income tax asset, current	16	14
Total current assets	10,746	10,878
Deferred income tax asset	189	170
Intangible assets, net	1,153	1,270
Property and equipment, net	1,065	1,103
Total assets	13,153	13,421
Current liabilities
Current maturities of note payable	0	390
Accounts payable current	178	136
Accrued expenses current	398	396
Accrued income tax	51	4
Total current liabilities	627	926
Long-term liabilities
Contingent earn-out	383	455
Total long-term liabilities	383	455
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,395,521 shares issued and outstanding	339	339
Additional paid-in capital	1,927	1,879
Retained earnings	9,906	9,855
Accumulated other comprehensive loss (unrealized loss on available-for-sale securities, net of income tax benefit)	(29)	(33)
Total stockholders' equity	12,143	12,040
Total liabilities and stockholders' equity	$ 13,153	$ 13,421