Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts Receivable, allowance	$ 5,934	$ 5,535
Property and equipment, accumulated depreciation	$ 12,399	$ 12,196
Common Class A
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	180,000,000	180,000,000
Common stock, shares issued	17,683,429	17,652,548
Common stock, shares outstanding	17,683,429	17,652,548
Common Class B
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	1	1
Common stock, shares outstanding	1	1