Shareholders' Equity (Schedule of ESPP Activity) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015
Shares issued from treasury
Shares Issued Under ESPP Plan (shares)	1,435	1,170	779	541	492	289	322	383	3,925	1,486
Closing Market Price (usd per share)	$ 1.39	$ 2.17	$ 1.80	$ 2.51	$ 3.14	$ 5.50	$ 5.35	$ 4.07
Shares Issued Under Loan Program (shares)	0	0	0	0	0	0	0	0	0	0
Dollar Value of Loans Issued	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Repayment of Loans	$ 0	$ 0	$ 0	$ 0	$ 35,400	$ 0	$ 1,000	$ 9,600	$ 0	$ 46,000
Minimum
Shares issued from treasury
Closing Market Price (usd per share)									$ 1.39	$ 3.14
Maximum
Shares issued from treasury
Closing Market Price (usd per share)									$ 2.51	$ 5.50