Note 8. Stock Options and Restricted Stock Units (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Note 8. Stock Options And Restricted Stock Units Details 3
Number of Restricted Stock Units Outstanding, Beginning	108,000	26,000
Number of Restricted Stock Units Granted	88,500	110,000
Number of Restricted Stock Units Vested/Issued	(55,000)	(25,000)
Number of Restricted Stock Units Forfeited	(15,000)	(3,000)
Number of Restricted Stock Units Outstanding, Ending	126,500	108,000
Weighted Average Exercise Price Outstanding, Beginning	$ 7.76	$ 9.26
Weighted Average Exercise Price Granted	5.28	7.32
Weighted Average Exercise Price Vested/Issued	7.32	7.20
Weighted Average Exercise Price Forfeited	6.61	9.26
Weighted Average Exercise Price Outstanding, Ending	$ 6.35	$ 7.76
Aggregate Intrinsic Value Outstanding, Beginning	$ 626,400	$ 232,960
Aggregate Intrinsic Value Granted	467,300	804,800
Aggregate Intrinsic Value, Vested/Issued	379,588	201,500
Aggregate Intrinsic Value Forfeited	111,941	26,880
Aggregate Intrinsic Value Outstanding, Ending	$ 1,138,500	$ 626,400