11. Fair Value measurements (Details-Finance receivables) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Finance Receivables Measured at Fair Value:
Balance at beginning of period	$ 743	$ 9,058	$ 1,664	$ 14,476
Payments on finance receivables at fair value	(427)	(3,766)	(1,348)	(7,873)
Charge-offs on finance receivables at fair value	0	(213)	0	(556)
Discount accretion	0	592	0	(353)
Mark to fair value	0	15	0	(8)
Balance at end of period	316	5,686	316	5,686
Debt Secured by Finance Receivables Measured at Fair Value:
Balance at beginning of period	0	8,576	1,250	13,117
Principal payments on debt at fair value	0	(3,515)	(1,250)	(8,554)
Premium accretion	0	186	0	490
Mark to fair value	0	145	0	339
Balance at end of period	0	5,392	0	5,392
Reduction for principal payments collected and payable	0	(878)	0	(878)
Adjusted balance at end of period	$ 0	$ 4,514	$ 0	$ 4,514