10. Fair Value Measurements (Details - Level 3 Fair Value Measurements) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Finance receivables measured at fair value	$ 412,895	$ 209,847	$ 0	$ 0	$ 0	$ 0
Level 3 [Member]
Finance receivables measured at fair value	412,895
Fair Value [Member]
Finance receivables measured at fair value	412,895		0
Fair Value [Member] | Level 3 [Member]
Finance receivables measured at fair value	$ 412,895		$ 0
Fair Value [Member] | Level 3 [Member] | Cumulative Net Losses [Member]
Unobservable Inputs, Inputs as of	16.00%
Fair Value [Member] | Level 3 [Member] | Discount Rate [Member] | Minimum [Member]
Unobservable Inputs, Inputs as of	9.20%
Fair Value [Member] | Level 3 [Member] | Discount Rate [Member] | MaximumMember
Unobservable Inputs, Inputs as of	10.70%