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Recent Accounting Pronouncements Details (Tables) | 6 Months Ended
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Jun. 30, 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 |  | 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 |
The impact of the adoption of the new accounting standard on the consolidated balance sheet and statement of operations was as follows (in thousands):
|  | Balance as Reported |  | Balance at January 1, 2018 Prior to Adoption |  | Effect of Change
Balance Sheets: |  |  |  |  |  |
Accounts receivable |  | $ | 5,629 |  |  | $ | 3,599 |  |  | $ | 2,030 |
Royalties and contingent legal fees payable |  | 4,765 |  |  | 3,953 |  |  | 812 |
Statements of Operations: |  |  |  |  |  |
Revenues |  | $ | 68,578 |  |  | $ | 66,548 |  |  | $ | 2,030 |
Inventor royalties |  | 22,985 |  |  | 22,287 |  |  | 698 |
Contingent legal fees |  | 16,796 |  |  | 16,682 |  |  | 114 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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