Note 11 - Stockholders' Equity (Details) (USD $)	1 Months Ended	12 Months Ended			12 Months Ended										12 Months Ended															12 Months Ended
	Nov. 30, 2006	Dec. 31, 2013	Dec. 31, 2012	Dec. 12, 2007	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2012 Restricted Stock Units (RSUs) [Member]	Dec. 31, 2013 Selling, General and Administrative Expenses [Member]	Dec. 31, 2012 Selling, General and Administrative Expenses [Member]	Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2012 The 1989 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2011 The 1989 Non-Qualified Stock Option Plan [Member]	Jun. 15, 1989 The 1989 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member] Minimum [Member]	Dec. 31, 2013 The 1989 Non-Qualified Stock Option Plan [Member] Maximum [Member]	Dec. 31, 2011 The 2001 Non-Qualified Stock Option Plan [Member] Director [Member]	Dec. 31, 2013 The 2001 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2012 The 2001 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2011 The 2001 Non-Qualified Stock Option Plan [Member]	Dec. 31, 2013 The 2007 Share Incentive Plan [Member] Director [Member]	Dec. 31, 2012 The 2007 Share Incentive Plan [Member] Director [Member]	Dec. 31, 2011 The 2007 Share Incentive Plan [Member] Director [Member]	Dec. 31, 2010 The 2007 Share Incentive Plan [Member] Director [Member]	Dec. 31, 2011 The 2007 Share Incentive Plan [Member] Directors and Key Employees [Member]	Dec. 31, 2013 The 2007 Share Incentive Plan [Member]	Dec. 31, 2012 The 2007 Share Incentive Plan [Member]	Dec. 31, 2011 The 2007 Share Incentive Plan [Member]	Dec. 31, 2013 Three Plans [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Note 11 - Stockholders' Equity (Details) [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	300,000			750,000										700,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years										4 years
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration															5 years	7 years				10 years								10 years		7 years	10 years
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01	$ 0.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross											0	0					14,000	0	0		28,087	19,975	200	16,500	40,400	0	0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price											$ 0	$ 0					$ 7.90	$ 0	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights																				25%
Share-based Compensation		$ 461,195	$ 234,858
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		187,730									35,250	41,900	102,000					152,480	162,480	170,590						0	200	200	187,730
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		16,650	68,210								6,650	60,100						10,000	8,110							0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		90,988	442,907
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value					123,000	142,000	190,000	86,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized					132,000		1,624,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					2 years 127 days		2 years 186 days
Allocated Share-based Compensation Expense									$ 462,000	$ 235,000