Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 505	$ 569
Treasury bills	7,487	7,872
Trade receivables, less allowance for doubtful accounts of $8	807	689
Inventories	1,495	1,564
Other current assets	167	170
Income tax receivable	32	0
Deferred income tax asset, current	1	14
Total current assets	10,494	10,878
Deferred income tax asset	198	170
Intangible assets, net	1,212	1,270
Property and equipment, net	1,082	1,103
Total assets	12,986	13,421
Current liabilities
Current maturities of note payable	0	390
Accounts payable current	155	136
Accrued expenses current	396	396
Accrued income tax	0	4
Total current liabilities	551	926
Long-term liabilities
Note payable - long term		0
Contingent earn-out	455	455
Total long-term liabilities	$ 455	$ 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	1,908	1,879
Retained earnings	9,766	9,855
Accumulated other comprehensive loss (unrealized loss on available-for-sale securities, net of income tax benefit)	(33)	(33)
Total stockholders' equity	11,980	12,040
Total liabilities and stockholders' equity	$ 12,986	$ 13,421