Equity Plans and Share-Based Compensation (Schedule of restricted stock activity) (Details) - Restricted Stock Units and Awards [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Shares
Non-vested, beginning balance (in shares)	20,502	557.25
Granted (in shares)	245,414	33,568.5
Vested (in shares)	(63,787)	(13,623.65)
Forfeited (in shares)	(36,768)	0
Non-vested, ending balance (in shares)	165,361	20,502
Weighted Average Grant-Date Fair-Value
Non-vested, beginning balance (in dollars per share)	$ 5.59	$ 140.00
Granted (in dollars per share)	1.97	11.40
Non-vested, ending balance (in dollars per share)	$ 1.84	$ 5.59