Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Allowance for doubtful accounts	$ 1,909,000	$ 3,388,000
Unamortized debt discount, current	0	3,000
Deferred Costs, Current	136,000	0
Unamortized debt discount, noncurrent	0	0
Deferred Costs, Noncurrent	$ 540,000	$ 0
Stockholders' Equity Note [Abstract]
Common stock, shares issued	32,382,162	33,416,110
Common stock, shares outstanding	32,382,162	33,416,110
Treasury stock, shares	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (per share)	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000	60,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares authorized	500,000	500,000
Preferred stock, par value (per share)	$ 0.10	$ 0.10