Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.21.1
Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 1 Months Ended 12 Months Ended
Aug. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Jan. 01, 2019
USD ($)
Accounting Policies [Line Items]        
Number of operating segment | segment   2    
Number of reportable segment | segment   2    
Restricted cash     $ 16,600  
Allowance for doubtful accounts   $ 100 100  
Proceeds from issuance of preferred stock   39,075 6,038  
Long-lived assets, impairment charges   0 0  
Revenue from Contract with Customer, Including Assessed Tax   44,531 34,921  
Allowance for sales returns   4,600 5,400  
Expenses related to sales returns   1,300 2,900  
Bad debt expense   49 100  
Operating lease liabilities   24,740 24,700  
Operating leases, right of use assets   20,487 21,480  
Retained earnings (accumulated deficit)   (482,760) (436,234)  
Notes Payable [Member]        
Accounting Policies [Line Items]        
Restricted cash     15,000  
Letter of Credit [Member]        
Accounting Policies [Line Items]        
Restricted cash   1,600 $ 1,600  
Opus Credit Facility (2019 Notes) [Member]        
Accounting Policies [Line Items]        
Weighted average effective interest rate     16.00%  
Repayments of debt $ 21,700 9,000    
Held-to-maturity Securities [Member]        
Accounting Policies [Line Items]        
Short-term investments   0 $ 0  
Cash and Cash Equivalents [Member]        
Accounting Policies [Line Items]        
Short-term investments   $ 76,800 15,000  
Oaktree Note [Member]        
Accounting Policies [Line Items]        
Weighted average effective interest rate   15.13%    
Accounting Standards Update 2016-02 [Member]        
Accounting Policies [Line Items]        
Operating lease liabilities       $ 26,800
Operating leases, right of use assets       23,000
Deferred rent credit       3,800
Retained earnings (accumulated deficit)       $ 0
Mustang [Member]        
Accounting Policies [Line Items]        
Costs for the design and construction of the facility   $ 500 $ 1,200  
Cyprium [Member]        
Accounting Policies [Line Items]        
Proceeds from issuance of preferred stock   $ 8,000