Long-Term Debt And Credit Facilities (Narrative) (Details)			1 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2013 USD ($)	Aug. 08, 2012 USD ($)	Sep. 30, 2016 USD ($)	Nov. 30, 2011 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	May 10, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Cash and cash equivalents					$ 5,739,124		$ 8,501,392		$ 1,602,951	$ 5,593,582
Payments of debt							$ 13,000,000
Healthcare Royalty Partners Debt [Member]
Debt Instrument [Line Items]
Amount of debt extinguished			$ 18,100,000
Deferred financing costs			300,000			$ 300,000
Accrued interest			500,000			500,000
Payments of debt			$ 13,000,000
Gain on debt extinguishment						$ 5,600,000
Term Loan [Member] | Healthcare Royalty Partners Debt [Member]
Debt Instrument [Line Items]
Amount borrowed	$ 2,500,000	$ 2,500,000		$ 15,000,000
Additional amount which may be borrowed				$ 5,000,000
Percentage of royalties entitled to receive				100.00%
Maturity date					Dec. 31, 2018
Annual interest rate				16.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 10,000,000
Line of credit facility, maturity date					Mar. 31, 2018
Minimum tangible net worth requirement, period one								$ (24,000,000)
Minimum tangible net worth requirement, period two								$ (24,500,000)
Total liquidity					$ 10,000,000
Line of credit facility, amount outstanding					0
Line of credit facility, current borrowing capacity					$ 4,300,000
Minimum [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Liquidity ratio								1.50