Capital Stock (Narrative) (Details)				3 Months Ended
	Apr. 01, 2019 item shares	Jan. 02, 2019 item shares	Mar. 17, 2017 $ / shares	Mar. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares	Mar. 16, 2017 $ / shares
Capital Stock [Line Items]
Common stock, par value | $ / shares			$ 0.001	$ 0.001	$ 0.001
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]
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		4,962
Number of directors | item		3
Directors, CFO And Interim CEO [Member] | Subsequent Event [Member]
Capital Stock [Line Items]
Common stock, New shares issued	4,411
Number of directors | item	3
Series A Preferred Stock [Member]
Capital Stock [Line Items]
Preferred stock, shares issued				0	0
Series A Preferred Stock [Member] | Rights Plan [Member]
Capital Stock [Line Items]
Preferred stock, shares issued				0