Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current Assets:
Allowance for doubtful accounts	$ 4,143	$ 2,833
Unamortized debt discount, current	0	0
Unamortized Deferred financing costs associated with term loan	136	136
Unamortized Deferred financing costs associated with term loan	$ 298	$ 452
Stockholders' Equity:
Preferred stock, par value (per share)	$ 0.1	$ 0.1
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (per share)	$ 0.1	$ 0.1
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	31,476,428	32,093,294
Common stock, shares outstanding	31,476,428	32,093,294
Treasury stock, shares	0	0