Organization and Significant Accounting Policies, Inventory Valuation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Inventory Valuation [Abstract]
Inventory write-off	$ 0	$ 0	$ 0
Inventories	$ 7,489	$ 6,899