Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 840	$ 569
Treasury bills	7,427	7,872
Trade receivables, less allowance for doubtful accounts of $8	770	689
Inventories	1,515	1,564
Other current assets	174	170
Income tax receivable	66	0
Total current assets	10,792	10,864
Deferred income tax asset, current	198	184
Intangible assets, net	1,035	1,270
Property and equipment, net	1,033	1,103
Total assets	13,058	13,421
Current liabilities
Current maturities of note payable	0	390
Accounts payable current	239	136
Accrued expenses current	304	396
Accrued income tax	0	4
Total current liabilities	543	926
Long-term liabilities
Contingent earn-out	195	455
Total long-term liabilities	195	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	1,953	1,879
Retained earnings	10,057	9,855
Accumulated other comprehensive loss (unrealized loss on available-for-sale securities, net of income tax benefit)	(29)	(33)
Total stockholders' equity	12,320	12,040
Total liabilities and stockholders' equity	$ 13,058	$ 13,421