SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of customers representing greater than 10% of revenues/accounts receivable balances

The following table sets forth customers who represented 10% or more of our total revenues for 2019, 2018 and 2017:

	Years Ended December 31,
	2019	2018	2017
McKesson Corporation	36%	26%	24%
AmerisourceBergen Drug Corporation	28%	27%	26%
Cardinal Health	13%	< 10%	< 10%

Schedule of property and equipment estimated useful lives

Property and equipment are recorded at cost and depreciated when placed into service using the straight-line method based on their estimated useful lives as follows:

	Useful Life
Computer equipment and software	5 Years
Furniture and fixtures	5 Years
Leasehold improvements	Lesser of Lease or Asset Life
Laboratory and production equipment	5 Years

Property and equipment, net consisted of the following as of December 31, 2019 and 2018 (in thousands):

	December 31,
	2019			2018
Computer equipment and software	$	1,568		$	1,637
Furniture and fixtures	1,714			1,737
Leasehold improvements	4,984			2,938
Laboratory and production equipment	6,570			6,000
Construction in progress	656			420
	15,492			12,732
Less: accumulated depreciation	(11,376		)	(5,211		)
Property and equipment, net	$	4,116		$	7,521

Schedule of components of basic and diluted net income (loss) per share

The components of basic and diluted earnings per share for 2019, 2018 and 2017 were as follows (in thousands, except per share data):

	Years Ended December 31,
	2019			2018			2017
Net loss from continuing operations	$	(466,456	)	$	(169,339	)	$	(205,153	)
Net income from discontinued operations	—			103,578			5,925
Weighted average common shares outstanding	34,030			34,394			34,907
Effect of dilutive securities:
Stock options and RSUs	—			—			—
Shares used in calculating dilutive net loss per share	34,030			34,394			34,907
Basic and diluted earnings per share:
Loss from continuing operations	$	(13.71	)	$	(4.92	)	$	(5.88	)
Income from discontinued operations	—			3.01			0.17
Total	$	(13.71	)	$	(1.91	)	$	(5.71	)

Schedule of anti-dilutive securities from computation of diluted net (loss) income per share

The following table sets forth the potential common shares issuable upon the exercise of outstanding options, the vesting of RSUs and the conversion of the Convertible Notes (in thousands):

	Years Ended December 31,
	2019	2018		2017
Options to purchase shares of common stock	3,976	3,797		3,531
Shares of common stock issuable upon the vesting of RSUs	1,579	1,129		1,070
Warrants	—	1,008		1,008
2022 Convertible Notes	11,695	11,695		11,695
2019 Convertible Notes	—	790		790
Shares of common stock under employee stock purchase plan	—	81	—	—
Total	17,250	18,500		18,094