Capital Stock (Narrative) (Details)				3 Months Ended
	Mar. 27, 2017 $ / shares	Feb. 13, 2017 USD ($) shares	Jan. 04, 2017 item shares	Mar. 31, 2017 USD ($) shares	Dec. 31, 2016 shares
Capital Stock [Line Items]
Costs of stock issuance in rights offering | $				$ 37,000
Number of directors | item			4
Proceeds from stock issuance in rights offering | $				$ 2,699,000
Rights Plan [Member]
Capital Stock [Line Items]
Number of preferred share purchase right for each outstanding share of its common stock to shareholder | $ / shares	$ 1
Common stock, Threshold for exercise of rights percentage	4.95%
Rights [Member]
Capital Stock [Line Items]
Common stock, New shares issued | shares		4,498,698
Costs of stock issuance in rights offering | $		$ 177,000
Proceeds from stock issuance in rights offering | $		$ 2,700,000
Directors, CFO And Interim CEO [Member]
Capital Stock [Line Items]
Common stock, New shares issued | shares			5,264
Directors, Management, And Affiliates [Member] | Rights [Member]
Capital Stock [Line Items]
Common stock, New shares issued | shares		3,293,407
Series A Preferred Stock [Member]
Capital Stock [Line Items]
Preferred stock, shares issued | shares				0	0