CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Cash Flows [Abstract]
Net loss from continuing operations	$ (5,114,000)	$ (15,228,000)
Adjustment to reconcile net loss from continuing operations to net cash used in operating activities:
Depreciation and amortization	944,000	1,195,000
Stock-based compensation	1,420,000	2,881,000
Gain on equity and other investments, net	(111,000)	(12,338,000)
Operating Lease, Impairment Loss	1,055,000	0
Foreign currency (gain) loss	(330,000)	(7,000)
Fair value adjustments to contingent consideration liability	(8,600,000)	1,000,000.0
Net change in certain operating assets and liabilities:
Trade accounts receivable	2,587,000	(1,077,000)
Prepaid expenses, operating lease and other assets	3,716,000	5,603,000
Accounts payable	(1,342,000)	145,000
Accrued, lease and other liabilities	(2,777,000)	(3,474,000)
Net Cash Provided by (Used in) Operating Activities, Continuing Operations	(8,083,000)	(21,315,000)
Cash Provided by (Used in) Operating Activities, Discontinued Operations	(2,555,000)	(4,055,000)
Net Cash Provided by (Used in) Operating Activities	(10,638,000)	(25,370,000)
Cash flows from investing activities:
Purchases of equipment, software, and leasehold improvements	(408,000)	(949,000)
Proceeds from sales and maturities of short-term investments	0	24,000
Acquisitions, net of cash acquired	0	12,249,000
Net Cash Provided by (Used in) Investing Activities, Continuing Operations	(408,000)	11,324,000
Cash Provided by (Used in) Investing Activities, Discontinued Operations	(2,160,000)	(243,000)
Net Cash Provided by (Used in) Investing Activities	(2,568,000)	11,081,000
Cash flows from financing activities:
Proceeds from issuance of common stock	0	199,000
Proceeds from Issuance of Preferred Stock and Preference Stock	10,000,000	0
Tax payments from shares withheld upon vesting of restricted stock	(26,000)	(309,000)
Proceeds from notes payable and long-term debt	2,876,000	3,900,000
Repayments of notes payable and long-term debt	(3,922,000)	0
Payment of financing fees	0	622,000
Other financing activities	2,106,000	900,000
Net Cash Provided by (Used in) Financing Activities, Continuing Operations	11,034,000	4,068,000
Cash Provided by (Used in) Financing Activities, Discontinued Operations	4,945,000	(4,691,000)
Net Cash Provided by (Used in) Financing Activities	15,979,000	(623,000)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	618,000	(100,000)
Net increase (decrease) in cash, cash equivalents and restricted cash	3,391,000	(15,012,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	25,570,000	22,179,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations	0	8,827,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	25,570,000	13,352,000
Supplemental disclosure of cash flow information:
us-gaap_DeferredIncomeTaxExpenseBenefitcontinuing operations	(191,000)	(29,000)
Continuing Operations
Supplemental disclosure of cash flow information:
Cash received from income tax refunds	2,169,000	2,225,000
Cash paid for income taxes	1,063,000	868,000
Increase (decrease) in accrued purchases of equipment, software, and leasehold improvements	(44,000)	(83,000)
Noncash or Part Noncash Acquisition, Investments Acquired	9,268,000	0
Discontinued Operations
Supplemental disclosure of cash flow information:
Cash received from income tax refunds	33,000	31,000
Cash paid for income taxes	331,000	327,000
Cash paid for interest expense	317,000	412,000
Noncash or Part Noncash Acquisition, Intangible Assets Acquired	$ 0	$ 23,700,000