Shareholders' Equity	12 Months Ended
Dec. 31, 2018
Shareholders' Equity [Abstract]
Shareholders' Equity	Note 12 – Shareholders’ Equity Preferred Stock - Series B Convertible Preferred Stock (“the Preferred Stock – Series B”) The Company has designated 10,000 shares of the Company’s preferred stock as Preferred Stock – Series B at a stated value of $1,000 per share. The Preferred Stock – Series B is convertible into common stock at a conversion price of $0.75 per share. The holders of the Preferred Stock – Series B are not entitled to receive dividends unless the Company’s Board of Directors declare a dividend for holders of the Company’s common stock and then the dividend shall be equal to the amount that such holder would have been entitled to receive if the holder converted its Preferred Stock – Series B into shares of the Company’s common stock. In the event of a liquidation, dissolution, or winding up of the Company, the Preferred Stock – Series B is entitled to receive liquidation preference before the Common Stock. The Company may at its option redeem the Preferred Stock – Series B by providing the required notice to the holders of the Preferred Stock – Series B and paying an amount equal to $1,000 multiplied by the number of shares for all of such holder’s shares of outstanding Preferred Stock – Series B to be redeemed. As of December 31, 2018 and 2017, there were 5,659 shares of Preferred Stock – Series B issued and outstanding. Common Stock During the year ended December 31, 2018, options to purchase 99,937 shares were exercised for proceeds of $98 thousand; and warrants to purchase 30,000 shares were exercised for proceeds of $46 thousand. Underwritten Public Offerings On May 24, 2017, the Company completed an underwritten offering of 3,300,000 shares of its common stock at an offering price of $2.00 and warrants to purchase up to 1,650,000 shares of common stock and realized net proceeds of $5.9 million dollars after underwriting discounts and offering expenses. The shares and warrants were purchased by a single institutional investor and by Stillwater, LLC, an affiliate of the Company. The Warrants have an exercise price of $2.45 per common share and a term of five years. On January 25, 2018 the Company entered into an underwriting agreement to issue and sell 9,807,105 shares of Company Common Stock, together with warrants to purchase 3,922,842 shares of Common Stock with an initial exercise price of $1.55 per share (at a public offering price of $1.35 per fixed combination consisting of one share of Common Stock and associated warrant to purchase four tenths of one share of Common Stock). The offering closed on January 29, 2018 and the Company received net proceeds after underwriting discounts and expenses of $11.9 million. In a concurrent private placement, certain of our directors and officers purchased an aggregate of 203,708 shares of Common Stock, together with warrants to purchase up to 81,487 shares of Common Stock at the public offering price of $1.35 per fixed combination. The private placement closed on February 15, 2018, and the Company received net proceeds of $0.3 million. In August 2011, our Board of Directors approved a stock repurchase plan authorizing us to repurchase our common stock not to exceed $2.5 million in total value. No shares were repurchased subsequent September 2012. As of December 31, 2017, authorization to repurchase $2.0 million in value of our common stock remained under this plan. Warrant Transactions On August 24, 2016, in consideration for the exercise of the 2,216,500 warrant shares, we issued new common stock purchase warrants (the “New Warrants”) to purchase 2,947,949 shares of our common stock which is equal to 133% of the 2,216,500 warrant shares exercised. The New Warrants have an exercise price of $2.60 per share, and are not exercisable for six months from the date of issuance, and have a term of five and a half years from the issuance date. We raised approximately $4.3 million in net proceeds from the transaction, which was used for general corporate purposes. At December 31, 2018, there were New Warrants outstanding to purchase 2,947,949 shares of Company’s common stock at an exercise price of $2.60, which expire in February 2023. Warrants to purchase 383,500 shares remaining from the December 2015 issuance were outstanding at December 31, 2018 at an exercise price of $2.05, which expire in June 2021. In addition, on March 24, 2017 a warrant to purchase 100,000 shares of common stock at an exercise price of $2.25 per share, was issued in conjunction with an unsecured line of credit as described in Note 7: Line of Credit, all of which remain outstanding as of December 31, 2018. On May 24, 2017, as described above, the Company issued warrants to purchase up to 1,650,000 shares of common stock at an exercise price of $2.45 in conjunction with a public offering, all of which remain outstanding as of December 31, 2018. As described above, in Note 11. Warrant Liability, the Company determined that these warrants are subject to liability accounting. In January and February 2018, the Company issued warrants to purchase up to 4,007,689 shares of its common stock at an exercise price of $1.55 in conjunction with a public offering and concurrent private placement. The Company determined that these warrants are subject to liability accounting and warrants to purchase 3,977,689 shares remain outstanding at December 31, 2018. Based on applicable accounting guidance contained in ASC 815 "Derivative s and Hedging - Contracts in Entity's Own Equity", the Company has determined that all of its outstanding warrants qualify as equity instruments, with the exception of the May 2017, and January and February 2018 Warrants described above.

Note 12 – Shareholders’ Equity

Preferred Stock - Series B Convertible Preferred Stock (“the Preferred Stock – Series B”)

The Company has designated 10,000 shares of the Company’s preferred stock as Preferred Stock – Series B at a stated value of $1,000 per share. The Preferred Stock – Series B is convertible into common stock at a conversion price of $0.75 per share. The holders of the Preferred Stock – Series B are not entitled to receive dividends unless the Company’s Board of Directors declare a dividend for holders of the Company’s common stock and then the dividend shall be equal to the amount that such holder would have been entitled to receive if the holder converted its Preferred Stock – Series B into shares of the Company’s common stock. In the event of a liquidation, dissolution, or winding up of the Company, the Preferred Stock – Series B is entitled to receive liquidation preference before the Common Stock. The Company may at its option redeem the Preferred Stock – Series B by providing the required notice to the holders of the Preferred Stock – Series B and paying an amount equal to $1,000 multiplied by the number of shares for all of such holder’s shares of outstanding Preferred Stock – Series B to be redeemed.

As of December 31, 2018 and 2017, there were 5,659 shares of Preferred Stock – Series B issued and outstanding.

Common Stock

During the year ended December 31, 2018, options to purchase 99,937 shares were exercised for proceeds of $98 thousand; and warrants to purchase 30,000 shares were exercised for proceeds of $46 thousand.

Underwritten Public Offerings

On May 24, 2017, the Company completed an underwritten offering of 3,300,000 shares of its common stock at an offering price of $2.00 and warrants to purchase up to 1,650,000 shares of common stock and realized net proceeds of $5.9 million dollars after underwriting discounts and offering expenses. The shares and warrants were purchased by a single institutional investor and by Stillwater, LLC, an affiliate of the Company. The Warrants have an exercise price of $2.45 per common share and a term of five years.

On January 25, 2018 the Company entered into an underwriting agreement to issue and sell 9,807,105 shares of Company Common Stock, together with warrants to purchase 3,922,842 shares of Common Stock with an initial exercise price of $1.55 per share (at a public offering price of $1.35 per fixed combination consisting of one share of Common Stock and associated warrant to purchase four tenths of one share of Common Stock). The offering closed on January 29, 2018 and the Company received net proceeds after underwriting discounts and expenses of $11.9 million.

In a concurrent private placement, certain of our directors and officers purchased an aggregate of 203,708 shares of Common Stock, together with warrants to purchase up to 81,487 shares of Common Stock at the public offering price of $1.35 per fixed combination. The private placement closed on February 15, 2018, and the Company received net proceeds of $0.3 million.

In August 2011, our Board of Directors approved a stock repurchase plan authorizing us to repurchase our common stock not to exceed $2.5 million in total value. No shares were repurchased subsequent September 2012. As of December 31, 2017, authorization to repurchase $2.0 million in value of our common stock remained under this plan.

Warrant Transactions

On August 24, 2016, in consideration for the exercise of the 2,216,500 warrant shares, we issued new common stock purchase warrants (the “New Warrants”) to purchase 2,947,949 shares of our common stock which is equal to 133% of the 2,216,500 warrant shares exercised. The New Warrants have an exercise price of $2.60 per share, and are not exercisable for six months from the date of issuance, and have a term of five and a half years from the issuance date.

We raised approximately $4.3 million in net proceeds from the transaction, which was used for general corporate purposes.

At December 31, 2018, there were New Warrants outstanding to purchase 2,947,949 shares of Company’s common stock at an exercise price of $2.60, which expire in February 2023. Warrants to purchase 383,500 shares remaining from the December 2015 issuance were outstanding at December 31, 2018 at an exercise price of $2.05, which expire in June 2021.

In addition, on March 24, 2017 a warrant to purchase 100,000 shares of common stock at an exercise price of $2.25 per share, was issued in conjunction with an unsecured line of credit as described in Note 7: Line of Credit, all of which remain outstanding as of December 31, 2018.

On May 24, 2017, as described above, the Company issued warrants to purchase up to 1,650,000 shares of common stock at an exercise price of $2.45 in conjunction with a public offering, all of which remain outstanding as of December 31, 2018. As described above, in Note 11. Warrant Liability, the Company determined that these warrants are subject to liability accounting.

In January and February 2018, the Company issued warrants to purchase up to 4,007,689 shares of its common stock at an exercise price of $1.55 in conjunction with a public offering and concurrent private placement. The Company determined that these warrants are subject to liability accounting and warrants to purchase 3,977,689 shares remain outstanding at December 31, 2018.

Based on applicable accounting guidance contained in ASC 815 "Derivative s and Hedging - Contracts in Entity's Own Equity", the Company has determined that all of its outstanding warrants qualify as equity instruments, with the exception of the May 2017, and January and February 2018 Warrants described above.