Summary of Significant Accounting Policies (Details 2) - Fair Value, Inputs, Level 3 [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Fair value liabilities	$ 152,589
Equity Securities [Member]
Fair value assets	$ 109,251
Equity Securities [Member] | Market Approach [Member] | Multiple of Revenue [Member]
Range	1.2x
Weighted Average	1.2x
Equity Securities [Member] | Market Approach [Member] | Multiple of EBITDA [Member]
Weighted Average	9.9x
Equity Securities [Member] | Market Approach [Member] | Multiple of EBITDA [Member] | Minimum [Member]
Range	8.5x
Equity Securities [Member] | Market Approach [Member] | Multiple of EBITDA [Member] | Maximum [Member]
Range	11.0x
Equity Securities [Member] | Market Approach [Member] | Multiple Of EV-10 [Member]
Range	0.35x
Weighted Average	0.35x
Equity Securities [Member] | Market Approach [Member] | Market Price Of Related Security [Member]
Weighted Average	$3.52
Equity Securities [Member] | Market Approach [Member] | Market Price Of Related Security [Member] | Minimum [Member]
Range	$0.70
Equity Securities [Member] | Market Approach [Member] | Market Price Of Related Security [Member] | Maximum [Member]
Range	$3.64
Equity Securities [Member] | Discounted Cash Flow [Member] | Market Interest Rate [Member]
Range	25.7%
Weighted Average	25.7%
Equity Securities [Member] | Option Pricing Model [Member] | Annualized Volatility [Member]
Range	75%
Weighted Average	75%
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 [Member]
Fair value liabilities	$ 4,616
Mandatorily redeemable noncontrolling interests issued after November 5, 2003 [Member] | Market Approach [Member] | Operating Income Multiple [Member]
Range	6.0x
Weighted Average	6.0x
Loans Receivables At Fair Value [Member]
Fair value liabilities	$ 43,338
Loans Receivables At Fair Value [Member] | Discounted Cash Flow [Member] | Market Interest Rate [Member]
Weighted Average	13.0%
Loans Receivables At Fair Value [Member] | Discounted Cash Flow [Member] | Market Interest Rate [Member] | Minimum [Member]
Range	12.5%
Loans Receivables At Fair Value [Member] | Discounted Cash Flow [Member] | Market Interest Rate [Member] | Maximum [Member]
Range	13.7%
Loans Receivable At Fair Value [Member] | Market Approach [Member] | Market Price Of Related Security [Member]
Weighted Average	$0.70