2. Changes in Accounting Principles (Details 2) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Beginning balance as previously reported, amount			$ 515
Impact of change in accounting principle, amount			200
Beginning balance, amount	$ 1,630	$ 715	715
Net loss	(63)	(515)	915
Ending balance, amount	1,631		1,630
Common Stock
Beginning balance as previously reported, amount			$ 14
Beginning balance as previously reported, shares			13,578,556
Beginning balance, amount	$ 14	$ 14	$ 14
Beginning balance, shares	14,287,556	13,578,556	13,578,556
Net loss, shares			709,000
Ending balance, amount	$ 14		$ 14
Ending balance, shares	14,288,656		14,287,556
Additional Paid-In Capital
Beginning balance as previously reported, amount			$ 58,716
Beginning balance, amount	$ 60,560	$ 58,716	58,716
Net loss			1,844
Ending balance, amount	60,624		60,560
Accumulated Deficit
Beginning balance as previously reported, amount			(58,215)
Impact of change in accounting principle, amount			200
Beginning balance, amount	(58,944)	$ (58,015)	(58,015)
Net loss	(63)		(929)
Ending balance, amount	$ (59,007)		$ (58,944)