Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Level 1		Level 2		Level 3		Total
	$ in thousands
Cash and cash equivalents	$	41,863	$	—	$	—	$	41,863
Notes Receivable	$	—	$	—	$	2,232	$	2,232

	Level 1		Level 2		Level 3		Total
	$ in thousands
Cash and cash equivalents	$	40,168	$	—	$	—	$	40,168
Notes Receivable	$	—	$	—	$	2,232	$	2,232

Fair Value Inputs, Assets, Quantitative Information [Table Text Block]

$ in thousands	Fair Value at 3/31/2013		Valuation Technique	Unobservable input	Range
Notes Receivable	$	2,232	Discounted cash flow	Probability of default	0	%
				Prepayment rates	0	%
				Loss severity	0	%

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	Three months ended March 31
	2013		2012
	$ in thousands
Notes Receivable balance, beginning of period	$	2,232	$	2,062
Issuances of new notes		—		44
Notes Receivable balance, end of period	$	2,232	$	2,106