​

December 31, 

($'s in thousands)

2021

2020

Accrued expenses:

​

​

Accrued emplyee compensation

$

2,702

$

2,041

Research and development - license fees

​

870

​

—

Accrued royalties payable

​

3,833

​

2,682

Accured coupons and rebates

​

10,603

​

12,869

Return reserve

​

3,240

​

2,580

Other

​

1,485

​

1,326

Total accrued expenses

​

$

22,733

​

$

21,498