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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Impact of Accounts Receivable Reserves on Gross Trade Accounts Receivable Balances

The following table summarizes the impact of accounts receivable reserves on the gross trade accounts receivable balances as of December 31, 2018 and 2017:

In thousands	December 31, 2018			December 31, 2017
Gross trade accounts receivable	$	86,133		$	57,802
Trade allowances		(19,495	)		(12,035	)
Chargebacks		(115	)		(449	)
Accounts receivable, net	$	66,523		$	45,318

Summary of Estimated Useful Lives, by Asset Classification

The estimated useful lives, by asset classification, are as follows:

Asset Classification		Useful Lives
Computer equipment and software		3 - 5 years
Furniture and fixtures		5 years
Leasehold improvements		Lesser of useful life or lease term

Calculation of Net Loss and Number of Shares Used to Compute Basic and Diluted Net Loss per Share

The calculation of net loss and the number of shares used to compute basic and diluted net loss per share for the years ended December 31, 2018, 2017 and 2016 are as follows:

In thousands	2018			2017			2016
Net loss—basic and diluted	$	(116,445	)	$	(67,865	)	$	(86,350	)
Weighted average shares outstanding—basic and diluted		297,237			270,652			211,874
Net loss per share—basic and diluted	$	(0.39	)	$	(0.25	)	$	(0.41	)

Anti-Dilutive Securities Not Included in the Computation of Net Loss or Earnings per Share

For the years ended December 31, 2018, 2017 and 2016, the following potentially dilutive securities were not included in the computation of net loss per share because the effect would be anti-dilutive:

In thousands	2018		2017		2016
Stock options		19,263		24,108		21,188
Restricted stock and restricted stock units		9,633		12,006		10,143
Exchangeable senior notes (if converted)		—		7,716		1,714
Preferred stock (if converted)		28,932		32,818		32,818

Assets and Liability Measured at Fair Value on a Recurring Basis

The following tables present information about the Company’s assets and liabilities as of December 31, 2018 and 2017 that are measured at fair value on a recurring basis and indicate the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value:

	December 31, 2018
In thousands	Total		Level 1		Level 2		Level 3
Asset:
Cash equivalents—money markets	$	9,880	$	9,880	$	—	$	—

	December 31, 2017
In thousands	Total		Level 1		Level 2		Level 3
Asset:
Cash equivalents—money markets	$	9,317	$	9,317	$	—	$	—

Carrying Amounts and Estimated Fair Values of Debt Instruments

The carrying amounts of cash, cash equivalents, accounts payable and accrued liabilities approximate fair value because of their short-term nature. The carrying amounts and the estimated fair values of debt instruments as of December 31, 2018 and 2017 are as follows:

	December 31, 2018				December 31, 2017
In thousands	Carrying Value		Estimated Fair Value		Carrying Value		Estimated Fair Value
Current portion of long-term debt from royalty-bearing instrument, net of accrued interest	$	33,602			$	21,569
Long-term debt from royalty-bearing instrument		46,108				70,834
Total long-term debt from royalty-bearing instrument	$	79,710	$	78,600	$	92,403	$	88,000

2017 Notes		—		—		28,992		38,200

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details