Warrant Issuances	12 Months Ended
Dec. 31, 2019
Warrant Liabilities [Abstract]
Warrant Liabilities [Text Block]	11. Warrant Issuances In connection with a Securities Purchase Agreement (“SPA”) with Unilumin, the Company issued the Unilumin Warrant to purchase 5,670,103 shares of the Company’s Common Stock at an exercise price of $0.97 per share. In 2019, Unilumin fully exercised the Unilumin Warrant, aggregating $5.5 million. The Company received cash of $5.3 million after fees related to the exercise of this warrant. On June 11, 2018, in connection with a Subordinated Secured Promissory Note (the “SMI Note”), the Company issued SM Investors, L.P. (“SMI”) a three-year warrant to purchase 82,500 shares of Common Stock at an exercise price of $0.01 per share. The Company utilized the Black-Scholes method to calculate the fair value of this warrant at the time of issuance, which was $95,000, and was treated as a debt discount. This warrant has not yet been exercised. On June 11, 2018, in connection with a Subordinated Secured Promissory Note (the “SMII Note”) with SM Investors II, L.P. (“SMII”), the Company issued SMII a three-year warrant to purchase 167,500 shares of Common Stock at an exercise price of $0.01 per share. The Company utilized the Black-Scholes method to calculate the fair value of this warrant at the time of issuance, which was $192,000, and was treated as a debt discount. This warrant has not yet been exercised. On April 23, 2015, the Company entered into a credit agreement with BFI Capital Fund II, LLC (“BFI”) for a $1.5 million credit line, which was repaid in full prior to 2016. In connection with the agreement, the Company also issued BFI a warrant to purchase 10,000 shares of Common Stock at an exercise price of $12.00 per share, which expires on April 23, 2020. This warrant has not yet been exercised. In November 2012, the Board of Directors approved the issuance to two board members, George W. Schiele and Salvatore J. Zizza, of warrants to purchase 20,000 shares of Common Stock at an exercise price of $12.50 per share. In April 2013, the Board of Directors approved the issuance to one board member, Jean Firstenberg, of warrants to purchase 2,000 shares of Common Stock at an exercise price of $12.50 per share. These warrants became fully vested on October 2, 2016 and expired on October 2, 2018. No expense was recorded in 2019 or 2018 related to these warrants. These warrants did not include a potential adjustment of the strike price if the Company sold or granted any options or warrants at a price per share less than the strike price of the warrants, so they were considered indexed to the Company’s Common Stock and were accounted for as equity at the time of the grant.

11. Warrant Issuances

In connection with a Securities Purchase Agreement (“SPA”) with Unilumin, the Company issued the Unilumin Warrant to purchase 5,670,103 shares of the Company’s Common Stock at an exercise price of $0.97 per share. In 2019, Unilumin fully exercised the Unilumin Warrant, aggregating $5.5 million. The Company received cash of $5.3 million after fees related to the exercise of this warrant.

On June 11, 2018, in connection with a Subordinated Secured Promissory Note (the “SMI Note”), the Company issued SM Investors, L.P. (“SMI”) a three-year warrant to purchase 82,500 shares of Common Stock at an exercise price of $0.01 per share. The Company utilized the Black-Scholes method to calculate the fair value of this warrant at the time of issuance, which was $95,000, and was treated as a debt discount. This warrant has not yet been exercised.

On June 11, 2018, in connection with a Subordinated Secured Promissory Note (the “SMII Note”) with SM Investors II, L.P. (“SMII”), the Company issued SMII a three-year warrant to purchase 167,500 shares of Common Stock at an exercise price of $0.01 per share. The Company utilized the Black-Scholes method to calculate the fair value of this warrant at the time of issuance, which was $192,000, and was treated as a debt discount. This warrant has not yet been exercised.

On April 23, 2015, the Company entered into a credit agreement with BFI Capital Fund II, LLC (“BFI”) for a $1.5 million credit line, which was repaid in full prior to 2016. In connection with the agreement, the Company also issued BFI a warrant to purchase 10,000 shares of Common Stock at an exercise price of $12.00 per share, which expires on April 23, 2020. This warrant has not yet been exercised.

In November 2012, the Board of Directors approved the issuance to two board members, George W. Schiele and Salvatore J. Zizza, of warrants to purchase 20,000 shares of Common Stock at an exercise price of $12.50 per share. In April 2013, the Board of Directors approved the issuance to one board member, Jean Firstenberg, of warrants to purchase 2,000 shares of Common Stock at an exercise price of $12.50 per share. These warrants became fully vested on October 2, 2016 and expired on October 2, 2018. No expense was recorded in 2019 or 2018 related to these warrants. These warrants did not include a potential adjustment of the strike price if the Company sold or granted any options or warrants at a price per share less than the strike price of the warrants, so they were considered indexed to the Company’s Common Stock and were accounted for as equity at the time of the grant.