CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS
Accounts and other receivables, allowance for doubtful accounts and commission adjustments	$ 4,872	$ 4,159
PROPERTY AND EQUIPMENT, accumulated depreciation	$ 4,980	$ 3,835
STOCKHOLDERS' EQUITY
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	175,741,970	173,811,533
Common stock, shares outstanding (in shares)	165,433,883	163,503,446
Treasury stock, at cost (in shares)	10,308,087	10,308,087