Recent Accounting Pronouncements (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

The cumulative effect of applying the new revenue standard, primarily relating to financing components of contracts executed in prior periods and estimates of variable consideration for sales and usage based royalty agreements executed in prior periods, was as follows (in thousands):

	Balance at December 31, 2017			Adjustments Due to ASC 606		Balance at January 1, 2018
Balance Sheets:
Accounts receivable	$	153		$	4,542	$	4,695
Royalties and contingent legal fees payable	1,601			1,728		3,329
Accumulated deficit	(320,018		)	2,506		(317,512		)
Noncontrolling interests	1,358			308		1,666

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The impact of the adoption of the new accounting standard on the condensed consolidated balance sheet and statement of operations was as follows (in thousands):

	December 31, 2018
	Balance as Reported		Balance under Legacy GAAP		Effect of Change
Balance Sheets:
Accounts receivable	$	32,884	$	28,500	$	4,384
Royalties and contingent legal fees payable	22,688		20,404		2,284
	Year Ended December 31, 2018
	Balance as Reported		Balance under Legacy GAAP		Effect of Change
Statements of Operations:
Revenues	$	131,506	$	131,723	$	217
Inventor royalties	$	35,168	$	34,295	$	(873	)
Contingent legal fees	$	31,501	$	32,020	$	519