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Supplemental Cash Flow Information	12 Months Ended
Supplemental Cash Flow Information	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION Cash paid for state income taxes totaled $181,000, $223,000 and $211,000 for the years ended December 31, 2017, 2016 and 2015, respectively. Foreign taxes withheld totaled $2,865,000, $14,776,000 and $4,421,000 for the years ended December 31, 2017, 2016 and 2015, respectively. Refer to Note 4 for accrued foreign taxes payable. Refer to Note 5 for information regarding noncash investing activity related to the investment in patent portfolios for the periods presented. Refer to Note 7 for information regarding noncash investing activity related to the investment in Veritone for the periods presented.