Debt	12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	Debt On August 9, 2013, as part of a round of debt financing led by Actua, Bolt entered into certain loan agreements with one of its minority shareholders that exercised its preemptive rights, Neurone II Investments G.P., Ltd. ("Neurone"). Those agreements provided for a term loan of $0.5 million, subject to an interest rate of 8.0% and maturity date of August 9, 2015. Since the loan matured on August 9, 2015, it has become payable on demand and interest continues to accrue at 8.0% interest. The principal amount on the loan, which is convertible into shares of preferred stock in Bolt, has a fair value of $0.5 million as of both December 31, 2016 and December 31, 2015. As of both December 31, 2016 and December 31, 2015, $0.5 million is outstanding under the term loan and is included in the line item "Short-term debt" in Actua’s Consolidated Balance Sheets. On January 1, 2015, as part of a round of debt financing led by Actua, Bolt entered into certain additional loan agreements with Neurone that provided for a term loan of $0.8 million, which is subject to an interest rate of 8.0% and a maturity date of May 1, 2016 and is now payable on demand. The loan, which is convertible into shares of Bolt’s preferred stock, has a fair value of $0.8 million as of December 31, 2016. As of both December 31, 2016 and December 31, 2015, $0.8 million is outstanding under the term loan and is included in the line item "Short-term debt" in Actua’s Consolidated Balance Sheets.

Debt

12 Months Ended

Dec. 31, 2016

On August 9, 2013, as part of a round of debt financing led by Actua, Bolt entered into certain loan agreements with one of its minority shareholders that exercised its preemptive rights, Neurone II Investments G.P., Ltd. ("Neurone"). Those agreements provided for a term loan of $0.5 million, subject to an interest rate of 8.0% and maturity date of August 9, 2015. Since the loan matured on August 9, 2015, it has become payable on demand and interest continues to accrue at 8.0% interest. The principal amount on the loan, which is convertible into shares of preferred stock in Bolt, has a fair value of $0.5 million as of both December 31, 2016 and December 31, 2015. As of both December 31, 2016 and December 31, 2015, $0.5 million is outstanding under the term loan and is included in the line item "Short-term debt" in Actua’s Consolidated Balance Sheets.

On January 1, 2015, as part of a round of debt financing led by Actua, Bolt entered into certain additional loan agreements with Neurone that provided for a term loan of $0.8 million, which is subject to an interest rate of 8.0% and a maturity date of May 1, 2016 and is now payable on demand. The loan, which is convertible into shares of Bolt’s preferred stock, has a fair value of $0.8 million as of December 31, 2016. As of both December 31, 2016 and December 31, 2015, $0.8 million is outstanding under the term loan and is included in the line item "Short-term debt" in Actua’s Consolidated Balance Sheets.