Capital Stock (Narrative) (Details)						6 Months Ended
	Jul. 03, 2017 item shares	Apr. 03, 2017 item shares	Mar. 17, 2017 $ / shares	Feb. 13, 2017 USD ($) shares	Jan. 04, 2017 item shares	Jun. 30, 2017 USD ($) $ / shares shares	Mar. 27, 2017 shares	Mar. 16, 2017 $ / shares	Dec. 31, 2016 $ / shares shares
Capital Stock [Line Items]
Common stock, par value | $ / shares						$ 0.001			$ 0.001
Preferred stock, shares authorized						25,000,000			25,000,000
Costs of stock issuance in rights offering | $						$ 102,000
Number of directors | item					4
Proceeds from stock issuance in rights offering | $						$ 2,699,000
Dividends conversion ratio						0.001
Exercise price | $ / shares								$ 1.10
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				4,498,698
Costs of stock issuance in rights offering | $				$ 242,000
Proceeds from stock issuance in rights offering | $				$ 2,700,000
Date declared						Mar. 17, 2017
Date to be paid						Mar. 27, 2017
Date of record						Mar. 16, 2017
Directors, CFO And Interim CEO [Member]
Capital Stock [Line Items]
Common stock, New shares issued	5,571	7,267			5,264
Number of directors | item	4	4
Directors, Management, And Affiliates [Member] | Rights [Member]
Capital Stock [Line Items]
Common stock, New shares issued				3,293,407
Series A Preferred Stock [Member]
Capital Stock [Line Items]
Preferred stock, shares authorized						10,000			10,000
Preferred stock, shares issued						0			0
Series A Preferred Stock [Member] | Rights Plan [Member]
Capital Stock [Line Items]
Preferred stock, shares issued							0