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Accrued Liabilities
 12 Months Ended
Dec. 31, 2019
Payables and Accruals [Abstract]  
Accrued Liabilities
Accrued Liabilities

Accrued liabilities consist of the following:
 
 
 December 31,
(in thousands)
 
2019
 
2018
 
 
 
 
 
Accrued rebates, chargebacks and other revenue reserves
 
$
5

 
$
4

Deferred revenue
 
959

 
1,040

Compensation
 
6,823

 
3,602

Interest
 
70

 
344

Legal
 
921

 
618

Other
 
3,145

 
3,632

Total (1)
 
$
11,923

 
$
9,240

________________
(1) The amounts above exclude $16.4 million and $30.1 million of accrued liabilities at Noden classified as held for sale as of December 31, 2019 and 2018, respectively. See Note 3, Discontinued Operations Classified as Assets Held for Sale, for additional information.