Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details)

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Fair Value Measurements (Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details)
$ in Thousands
Mar. 31, 2022
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash equivalents $ 682
Short-term investments 787
Long-term investments 2,052
Liabilities (22,961)
Fair Value, Inputs, Level 1 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash equivalents 682
Fair Value, Inputs, Level 2 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Short-term investments 787
Long-term investments 2,052
Fair Value, Inputs, Level 3 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Liabilities (22,961)
Money Market Funds [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash equivalents 682
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Cash equivalents 682
Corporate Notes/Bonds [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Short-term investments 787
Long-term investments 2,052
Corporate Notes/Bonds [Member] | Fair Value, Inputs, Level 2 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Short-term investments 787
Long-term investments 2,052
Contingent Value Rights [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Liabilities (18,277)
Contingent Value Rights [Member] | Fair Value, Inputs, Level 3 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Liabilities (18,277)
Contingent Consideration [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Liabilities (4,684)
Contingent Consideration [Member] | Fair Value, Inputs, Level 3 [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Liabilities $ (4,684)