Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance (in Dollars)	$ 6,893	$ 6,034
Common stock, shares authorized	40,000,000	40,000,000
Common stock, par value (in Dollars per share)	$ 0.001	$ 0.001
Common stock, shares issued	17,081,535	16,870,285
Common stock, shares outstanding	17,081,535	16,870,285
Treasury shares, shares	1,029,557	1,014,108
Cash Dividends [Member]
Convertible Preferred Stock, Dividend Rate	5.50%
Convertible Preferred Stock, Liquidation Multiplier	5.50%
Paid-in-kind Dividends [Member]
Convertible Preferred Stock, Dividend Rate	8.50%
Convertible Preferred Stock, Liquidation Multiplier	8.50%
Convertible Preferred Stock [Member]
Convertible Preferred Stock, Shares Authorized	10,000,000	10,000,000
Convertible Preferred Stock, Par Value (in Dollars per share)	$ 0.001	$ 0.001
Convertible Preferred Stock, Shares Issued	805,000	0
Convertible Preferred Stock, Shares Outstanding	805,000	0