Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives

Estimated useful lives by major asset category are as follows:

Manufacturing equipment	10 years
Laboratory equipment	7 years
Furniture and fixtures	5 years
Software, computer and other equipment	3 years
Leasehold improvements	Lower of estimated useful life or term of lease

Property, plant and equipment, net consists of the following:

(in thousands)	DECEMBER 31,
	2019			2018
Manufacturing equipment	$	18,073		$	2,366
Laboratory equipment	7,525			6,038
Furniture and fixtures	1,648			1,815
Software, computer and other equipment	7,772			2,702
Leasehold improvements	29,720			4,072
Construction-in-progress	3,892			49,057
Property, plant and equipment	68,630			66,050
Less: Accumulated depreciation	(10,483		)	(5,525		)
Property, plant and equipment, net	$	58,147		$	60,525

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:

	DECEMBER 31,
	2019	2018	2017
2014 Convertible Notes	—	—	5,040,323
Outstanding stock options	8,425,551	6,935,119	6,457,343
Stock purchase warrants	4,500	154,500	157,500
Nonvested restricted stock awards	754,415	572,706	447,049
Nonvested restricted stock units	41,811	—	—
Total	9,226,277	7,662,325	12,102,215