Note 8. Employee Stock Options (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Notes to Financial Statements
Number of Options Outstanding, Beginning	220,596	127,500
Number of Options Granted	140,000	196,000
Number of Options Exercised	(74,360)	(25,154)
Number of Options expired or cancelled	0	(70,000)
Number of Options Forfeited	(5,400)	(7,750)
Number of Options Outstanding, Ending	280,836	220,596
Range of Exercise Price Options Outstanding, Beginning	0.01 - $3.33	1.70 - $2.32
Range of Exercise Price Options Granted	7.76 - $8.25	0.01 - $3.33
Range of Exercise Price Options Exercised	0.01 - $3.33	1.70 - $2.10
Range of Exercise Price Options expired or cancelled		0.01
Range of Exercise Price Options Forfeited	0.01 - $3.33	1.70 - $3.33
Range of Exercise Price Options Outstanding, Ending	0.01 - $8.25	0.01 - $3.33
Weighted Average Exercise Price Outstanding, Beginning	$ 2.09	$ 2.07
Weighted Average Exercise Price Granted	$ 7.90	$ 1.37
Weighted Average Exercise Price Exercised	$ 2.14	$ 2.04
Weighted Average Exercise Price expired or Canceled		$ 0.01
Weighted Average Exercise Price Forfeited	$ 1.39	$ 2.45
Weighted Average Exercise Price Outstanding, Ending	$ 4.97	$ 2.09
Aggregate Intrinsic Value Outstanding, Beginning	$ 257,835	$ 24,590
Aggregate Intrinsic Value Granted	$ 0	$ 370,750
Aggregate Intrinsic Value Exercised	405,738	35,661
Aggregate Intrinsic Value Options expired or cancelled		226,800
Aggregate Intrinsic Value Forfeited	$ 15,256	$ 6,438
Aggregate Intrinsic Value Outstanding, Ending	$ 1,340,684	$ 257,835