Consolidated Balance Sheets Parentheticals - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Allowance for doubtful accounts	$ 1,403,858	$ 1,627,315
Customer relationships and other intangible assets, accumulated amortization	$ 30,784,159	$ 26,785,810
Stockholders' equity:
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	29,941,529	29,765,525
Common stock, shares oustanding	28,992,684	29,727,588
Treasury stock, shares	948,845	37,937