Statements of Changes in Equity - USD ($) $ in Thousands	Total	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2016	$ 37,340	$ 37,994	$ (654)
Net income (loss)	1,659	1,659
Other comprehensive loss	(5)		(5)
Reclassification of stranded tax effects in accumulated other comprehensive loss		130	(130)
Balance at Dec. 31, 2017	38,994	39,783	(789)
Net income (loss)	(19)	(19)
Other comprehensive loss	(794)		(794)
Balance at Dec. 31, 2018	$ 38,181	$ 39,764	$ (1,583)