Description of Business and Summary of Significant Accounting Policies (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Dec. 31, 2019
Assets [Abstract]
Total assets measured at fair value	[1]	$ 32,159	$ 5,551
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	6,122	10,095
Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Total assets measured at fair value	[1]	32,159	5,551
Fair Value, Inputs, Level 2 [Member]
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	0	0
Fair Value, Inputs, Level 3 [Member]
Liabilities [Abstract]
Total liabilities measured at fair value	[1]	6,122	10,095
Contingent accrued earn-out acquisition consideration [Member]
Liabilities [Abstract]
Derivative liabilities	[1],[2]	6,122	10,095
Contingent accrued earn-out acquisition consideration [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities [Abstract]
Derivative liabilities	[1],[2]	6,122	10,095
Certificates of Deposit [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		31,599	4,493
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		31,599	4,493
Mutual Fund [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		560	1,058
Mutual Fund [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		560	1,058
Certificates of Deposit [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		240	50
Mutual Fund [Member] | Fair Value, Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale Securities		$ 560	$ 1,058

[1] months ended June 30, 2020 and the year ended December 31, 2019 there were no transfers between fair value levels 1, 2, or 3.

[2] The income valuation approach is applied and the valuation inputs include the contingent payment arrangement terms, projected cash flows, rate of return, and probability assessments.