Summary of Significant Accounting Policies - Changes in Accumulated Other Comprehensive Income (Loss), Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($)
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (16)
Balance at the end of the period	$ 4	$ (16)
Segment Reporting
Number of reportable operating segments | item	1
Number of product areas | item	3
Unrealized Gains (Losses) on Securities Available for Sale
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (16)	25
Other comprehensive income before reclassifications	20	(41)
Net current period other comprehensive income	20	(41)
Balance at the end of the period	$ 4	$ (16)