Long-Term Debt Conversion to Royalty Obligation (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Amount | Iowa Department of Economic Development Loan 2005
Debt Instrument
Original Balance	$ 6,000,000
Outstanding Balance		6,000,000
Amount | Iowa Economic Development Authority Royalty Obligation 2012
Debt Instrument
Outstanding Balance	6,000,000
Revised Royalty Maximum Amount	6,800,000
Amount | Iowa State University Research Park Loan 2009
Debt Instrument
Original Balance	800,000
Outstanding Balance	546,000	641,000
Amount | Iowa State University Research Park Loan 2012
Debt Instrument
Original Balance	456,000
Outstanding Balance	443,000	0
Amount | City of Ames Forgivable Loan 2010 [Member]
Debt Instrument
Original Available Balance	400,000
Remaining Available Balance	100,000
Jobs by March 10, 2012	70
Jobs by March 10, 2015	150
Lease square feet	20,000
Repayment per job	3,100
Outstanding Balance Forgivable Loan	$ 300,000
Percent | Iowa Economic Development Authority Royalty Obligation 2012
Debt Instrument
Revised Royalty Rate	0.50%
Percent | Iowa State University Research Park Loan 2009
Debt Instrument
Interest rate initial	3.00%
Interest rate after five years	5.00%
Interest rate in default	8.00%
Percent | Iowa State University Research Park Loan 2012
Debt Instrument
Interest rate initial	3.00%
Interest rate after five years	5.00%
Interest rate in default	8.00%
Percent | City of Ames Forgivable Loan 2010 [Member]
Debt Instrument
Interest rate in default	6.50%