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Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Summarizes the Impact of Accounts Receivable Reserves on Gross Trade Accounts Receivable

The following table summarizes the impact of accounts receivable reserves on the gross trade accounts receivable balances as of June 30, 2018 and December 31, 2017:

In thousands		June 30, 2018				December 31, 2017
Gross trade accounts receivable		$	67,004			$	57,802
Trade allowances			(16,333	)			(12,035	)
Chargebacks			(362	)			(449	)
Accounts receivable, net		$	50,309			$	45,318

Estimated Useful Lives

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

Net Loss and the 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 three and six months ended June 30, 2018 and 2017 are as follows:

		Three months ended June 30,								Six months ended June 30,
In thousands		2018				2017				2018				2017
Net loss—basic and diluted		$	(34,210	)		$	(13,634	)		$	(58,305	)		$	(34,575	)
Weighted average shares outstanding—basic and diluted			293,662				270,725				289,458				270,445
Net loss per share—basic and diluted		$	(0.12	)		$	(0.05	)		$	(0.20	)		$	(0.13	)

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

For the three and six months ended June 30, 2018 and 2017, the following potentially dilutive securities were not included in the computation of net loss per share because the effect would be anti-dilutive:

		Three months ended June 30,								Six months ended June 30,
In thousands		2018				2017				2018				2017
Stock options			25,282				23,710				25,282				23,710
Restricted stock and restricted stock units			12,249				12,102				12,249				12,102
Exchangeable senior notes (if converted)			7,716				7,716				7,716				7,716
Preferred stock (if converted)			32,818				32,818				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 June 30, 2018 and December 31, 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:

		June 30, 2018
In thousands		Total				Level 1				Level 2				Level 3
Asset:
Cash equivalents—money markets		$	9,388			$	9,388			$	—			$	—

		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 June 30, 2018 and December 31, 2017 are as follows:

		June 30, 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		$	27,154							$	21,569
Long-term debt from royalty-bearing instrument			59,564								70,834
Total long-term debt from royalty-bearing instrument		$	86,718			$	85,200			$	92,403			$	88,000
2017 Notes			29,103				34,800				28,992				38,200

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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.

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