Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Lease Guarantee In connection with the spin-off by the Company of Facet Biotech Corporation (“Facet”), the Company entered into amendments to the leases for the Company’s former facilities in Redwood City, California, under which Facet was added as a co-tenant, and a Co-Tenancy Agreement, under which Facet agreed to indemnify the Company for all matters related to the leases attributable to the period after the spin-off date. In April 2010, Abbott Laboratories acquired Facet and later renamed the entity AbbVie Biotherapeutics, Inc. (“AbbVie”). If AbbVie were to default under its lease obligations, the Company could be held liable by the landlord as a co-tenant and, thus, the Company has in substance guaranteed the payments under the lease agreements for the Redwood City facilities. As of December 31, 2020, the total lease payments for the duration of the guarantee, which runs through December 2021 and is non-extendible, are approximately $11.3 million. The Company prepared a discounted, probability weighted cash flow analysis to calculate the estimated fair value of the lease guarantee as of the spin-off. The Company was required to make assumptions regarding the probability of Facet’s default on the lease payment, the likelihood of a sublease being executed and the times at which these events could occur. These assumptions are based on information that the Company received from real estate brokers and the then-current economic conditions, as well as expectations of future economic conditions. The fair value of this lease guarantee was charged to Additional paid-in capital upon the spin-off and any future adjustments to the carrying value of the obligation will also be recorded in Additional paid-in capital. The Company has recorded a liability of $10.7 million as of December 31, 2020 and 2019, related to this guarantee. Wind Down Payments to Stock Option Holders The Wind Down Retention Plan provides for equitable adjustments to outstanding stock options held by participants to ensure such participants realize the same benefits provided to shareholders in the event one or more cash or other distributions become payable to shareholders. Consistent with the existing terms of the Equity Plan, in the event one or more cash or other distributions are paid to shareholders, the exercise price of outstanding stock options will be reduced on a dollar-for-dollar basis to reflect the per share value of such distributions. In the event that the Company declares cash or other distributions that, in the aggregate, exceed the difference between the exercise price of an outstanding stock option and the par value of the underlying shares ($0.01), the holder of such stock option will be entitled to receive from the Company a cash payment in an amount equal to the number of shares subject to such stock option multiplied by the per share amount of the cash or other distribution that exceeds the difference between exercise price of the outstanding option and the par value of the underlying shares (a “true-up payment”). A true-up payment is also paid with respect to a post-dissolution cash or other distributions with respect to a stock-option that was not exercised prior to dissolution in the same fashion as provided above. True-up payments are to be made on the same date that cash or other distributions are paid or made to the Company’s stockholders. As of December 31, 2020, the Company has 11,141,051 stock options outstanding at a weighted average adjusted exercise price of $1.87. As of January 4, 2021, the date we filed our Certificate of Dissolution, the Company was unable to issue stock for any purpose, including to cover the exercise of employee options, and as a result such options became unexercisable. Purchase Obligations After the sale of Noden and the spin-off of LENSAR, the Company no longer has any purchase obligations and the Company was released from all of its guarantees for purchase obligations. Escrow Receivable SWK Royalty Asset Escrow The proceeds from the sale of the three royalty interests to SWK totaled $4.35 million, 90% of which was received at the closing of the transaction. The remaining 10% or $435 thousand, included in “Receivables from asset sales” in the Statement of Net Assets in Liquidation, is currently held in escrow against certain potential contingencies and is to be released on the one-year anniversary of the closing, subject to the satisfaction of any such potential contingencies.