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Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2020
Accounting Policies [Abstract]  
Schedule of Estimated Useful Lives
Estimated useful lives by major asset category are as follows:
Manufacturing equipment10 years
Laboratory equipment7 years
Furniture and fixtures5 years
Software, computer and other equipment3 years
Leasehold improvementsLower of estimated useful life or term of lease
Property, plant and equipment, net consists of the following:
(in thousands)JUNE 30, 2020DECEMBER 31, 2019
Manufacturing equipment$21,527  $18,073  
Laboratory equipment7,811  7,525  
Furniture and fixtures1,664  1,648  
Software, computer and other equipment7,994  7,772  
Leasehold improvements30,026  29,720  
Construction-in-progress936  3,892  
 Property, plant and equipment69,958  68,630  
Less: Accumulated depreciation(13,781) (10,483) 
Property, plant and equipment, net$56,177  $58,147  
Schedule of Computation of Diluted EPS
The potential common stock equivalents that have been excluded from the computation of Diluted EPS consist of the following:
 THREE MONTHS ENDED 
JUNE 30,		SIX MONTHS ENDED 
JUNE 30,
 2020201920202019
Outstanding stock options8,628,753  7,514,268  8,628,753  7,514,268  
Stock purchase warrants4,500  79,500  4,500  79,500  
Non-vested restricted stock awards and performance share units578,923  728,705  578,923  728,705  
Non-vested restricted stock units30,827  —  30,827  —  
Total9,243,003  8,322,473  9,243,003  8,322,473