Other Comprehensive Income - Summary of Other Comprehensive Income (Details) - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net current period other comprehensive income	$ (56,000)	$ 56,000
Ending Balance	0
Available-for-sale security
Other Comprehensive Income (Loss), before Tax [Abstract]
Beginning Balance	92,000	0
Other comprehensive income / (loss) before reclassification	(30,000)	92,000
Amounts reclassified from accumulated other comprehensive income	(62,000)	0
Net current period other comprehensive income	(92,000)	92,000
Ending Balance	0	92,000
Other Comprehensive Income (Loss), Tax [Abstract]
Beginning Balance	(36,000)	0
Other comprehensive income / (loss) before reclassification	11,000	(36,000)
Amounts reclassified from accumulated other comprehensive income	25,000	0
Net current period other comprehensive income	36,000	(36,000)
Ending Balance	0	(36,000)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance	56,000	0
Other comprehensive income / (loss) before reclassification	(19,000)	56,000
Amounts reclassified from accumulated other comprehensive income	37,000	0
Net current period other comprehensive income	(56,000)	56,000
Ending Balance	$ 0	$ 56,000