Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Accumulated other comprehensive income/(loss)
Balances, beginning of period	$ 27,065	$ 25,283
Balances, end of period	40,525	27,065
Accumulated other comprehensive income/(loss) net of tax
Balances, beginning of period	27,065	25,283
Balances, end of period	40,525	27,065
Accumulated other comprehensive income/(loss) [Member]
Accumulated other comprehensive income/(loss)
Balances, beginning of period	(35)	11
Balances, end of period	15	(35)
Accumulated other comprehensive income/(loss) net of tax
Balances, beginning of period	(35)	11
Balances, end of period	15	(35)
Accumulated due to realization of gain/(loss) on marketable securities [Member]
Accumulated other comprehensive income/(loss)
Other comprehensive loss due to change in fair market value of marketable securities during period before reclassifications	50	(34)
Reclassifications		(12)
Accumulated other comprehensive income/(loss) net of tax
Other comprehensive loss due to change in fair market value of marketable securities during period before reclassifications	43	(29)
Reclassifications		(10)
Accumulated other comprehensive income after tax [Member]
Accumulated other comprehensive income/(loss)
Balances, beginning of period	(29)	10
Balances, end of period	14	(29)
Accumulated other comprehensive income/(loss) net of tax
Balances, beginning of period	(29)	10
Balances, end of period	$ 14	$ (29)

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 55
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=51821188&loc=d3e1436-108581

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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