Employee Stock Compensation Plans	6 Months Ended
Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Compensation Plans	8. Employee Stock Compensation Plans Solitario had no outstanding options or equity awards at June 30, 2017 or December 31, 2016. Solitario recognizes stock option compensation expense on the date of grant for 25% of the grant date fair value, and subsequently, based upon a straight line amortization of the unvested grant date fair value of each of its outstanding options. During the three and six months ended June 30, 2016, Solitario recorded $29,000 and $31,000, respectively, of stock option expense for the amortization of grant date fair value with a credit to additional paid-in-capital. Solitario recorded no stock option expense during the three and six months ended June 30, 2017. The 2006 Plan On June 27, 2006, Solitario’s shareholders approved the 2006 Stock Option Incentive Plan (the “2006 Plan”). On June 27, 2016, the 2006 Plan terminated and as of that date no additional options may be granted pursuant to the 2006 Plan. During the three and six months ended June 30, 2016, Solitario granted options to acquire 350,000 shares of common stock under the 2006 Plan. By their initial terms the options had a five-year term, vested 25% on the date of grant and were to vest 25% on each of the next three anniversary dates of the date of grant, and had a grant date fair value based upon a Black-Scholes model with a 63% expected volatility, and 1% risk-free interest rate. These options were subsequently surrendered by the holders and cancelled on August 24, 2016. No options were exercised during the three and six months ended June 30, 2017 and 2016 under the 2006 Plan. The 2013 Plan On June 18, 2013 Solitario’s shareholders approved the 2013 Solitario Exploration & Royalty Corp. Omnibus Stock and Incentive Plan (the “2013 Plan”). On June 29, 2017, Solitario shareholders approved an amendment to the 2013 Plan, which increased the number of shares available of common stock for issuance under the 2013 Plan from 1,750,000 to 5,750,000. Under the terms of the 2013 Plan, the Board of Directors may grant awards to directors, officers, employees and consultants. Such awards may take the form of stock options, stock appreciation rights, restricted stock, and restricted stock units. The terms and conditions of the awards are pursuant to the 2013 Plan and are granted by the Board of Directors or a committee appointed by the Board of Directors. There were no stock grants or awards or exercises of options or awards under the 2013 Plan during the three and six months ended June 30, 2017 and 2016.

Employee Stock Compensation Plans

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

8. Employee Stock Compensation Plans

Solitario had no outstanding options or equity awards at June 30, 2017 or December 31, 2016. Solitario recognizes stock option compensation expense on the date of grant for 25% of the grant date fair value, and subsequently, based upon a straight line amortization of the unvested grant date fair value of each of its outstanding options. During the three and six months ended June 30, 2016, Solitario recorded $29,000 and $31,000, respectively, of stock option expense for the amortization of grant date fair value with a credit to additional paid-in-capital. Solitario recorded no stock option expense during the three and six months ended June 30, 2017.

The 2006 Plan

On June 27, 2006, Solitario’s shareholders approved the 2006 Stock Option Incentive Plan (the “2006 Plan”). On June 27, 2016, the 2006 Plan terminated and as of that date no additional options may be granted pursuant to the 2006 Plan. During the three and six months ended June 30, 2016, Solitario granted options to acquire 350,000 shares of common stock under the 2006 Plan. By their initial terms the options had a five-year term, vested 25% on the date of grant and were to vest 25% on each of the next three anniversary dates of the date of grant, and had a grant date fair value based upon a Black-Scholes model with a 63% expected volatility, and 1% risk-free interest rate. These options were subsequently surrendered by the holders and cancelled on August 24, 2016. No options were exercised during the three and six months ended June 30, 2017 and 2016 under the 2006 Plan.

The 2013 Plan

On June 18, 2013 Solitario’s shareholders approved the 2013 Solitario Exploration & Royalty Corp. Omnibus Stock and Incentive Plan (the “2013 Plan”). On June 29, 2017, Solitario shareholders approved an amendment to the 2013 Plan, which increased the number of shares available of common stock for issuance under the 2013 Plan from 1,750,000 to 5,750,000. Under the terms of the 2013 Plan, the Board of Directors may grant awards to directors, officers, employees and consultants. Such awards may take the form of stock options, stock appreciation rights, restricted stock, and restricted stock units. The terms and conditions of the awards are pursuant to the 2013 Plan and are granted by the Board of Directors or a committee appointed by the Board of Directors. There were no stock grants or awards or exercises of options or awards under the 2013 Plan during the three and six months ended June 30, 2017 and 2016.