Note 8. Stock Options and Restricted Stock Units (Details 1)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Number of Options Outstanding, Ending	163,850
Option 1
Exercise Price Range	$0.01 - $1.00
Number of Options Outstanding, Ending	12,850
Weighted Average Exercise Price | $ / shares	$ 0.01
Weighted Average Remaining Contractual Life (in Years)	5 years 18 days
Number of Options Exercisable	12,850
Option 2
Exercise Price Range	$1.01 - $4.00
Number of Options Outstanding, Ending	11,000
Weighted Average Exercise Price | $ / shares	$ 3.33
Weighted Average Remaining Contractual Life (in Years)	5 years 3 months
Number of Options Exercisable	11,000
Option 3
Exercise Price Range	$4.01 - $7.00
Number of Options Outstanding, Ending	10,000
Weighted Average Exercise Price | $ / shares	$ 6.80
Weighted Average Remaining Contractual Life (in Years)	8 years 10 months 17 days
Number of Options Exercisable	2,500
Option 4
Exercise Price Range	$7.01 - $9.00
Number of Options Outstanding, Ending	78,750
Weighted Average Exercise Price | $ / shares	$ 7.76
Weighted Average Remaining Contractual Life (in Years)	3 years 8 months 12 days
Number of Options Exercisable	63,751
Option 5
Exercise Price Range	$9.01 - $10.00
Number of Options Outstanding, Ending	11,250
Weighted Average Exercise Price | $ / shares	$ 9.26
Weighted Average Remaining Contractual Life (in Years)	7 years 11 months 26 days
Number of Options Exercisable	6,670
Option 6
Exercise Price Range	$10.01 - $13.49
Number of Options Outstanding, Ending	40,000
Weighted Average Exercise Price | $ / shares	$ 13.49
Weighted Average Remaining Contractual Life (in Years)	2 years 2 months 8 days
Number of Options Exercisable	27,500
Total
Number of Options Outstanding, Ending	163,850
Weighted Average Exercise Price | $ / shares	$ 8.30
Weighted Average Remaining Contractual Life (in Years)	4 years 1 month 24 days
Number of Options Exercisable	124,271