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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities: |  |  |
Net loss | $ (36,235,484) | $ (39,697,960) | $ (39,451,324)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities: |  |  |
Depreciation and other amortization | 132,189 | 174,275 | 247,357
Loss on change in fair value of warrant liability | 4,738,753 | 894,785 | 0
Lease termination | 1,225,421 | 0 | 0
Stock-based compensation | 1,101,031 | 775,541 | 1,574,038
Deferred income taxes (benefit)/provision | (2,718,029) | 20,423 | 21,103
Write down of inventory, net | 536,000 | 0 | 0
Non-cash backstop fee | 0 | (1,764,240) | 0
Loss on disposal of assets | 0 | 0 | 243,707
Non-cash interest expense | 4,497,271 | 566,779 | 10,052
Interest expense on term loan-paid with restricted cash | 10,228,469 | 1,222,222 | 0
Changes in assets and liabilities: |  |  |
Accounts receivable | 1,352,263 | 522,360 | (3,185,098)
Inventory | 22,690,715 | (13,762,876) | 6,597,389
Deferred costs | (23,943,057) | (19,712,849) | (20,075,554)
Prepaid expenses and other current assets | (1,065,573) | (330,443) | 229,266
Other assets | (60,084) | 80,928 | 0
Accounts payable, accrued expenses and other current liabilities | (1,847,427) | (177,342) | 1,862,779
Liabilities subject to compromise | 0 | (160,072,170) | (192,067,797)
Deferred revenue | 11,412,898 | 112,225,534 | 255,176,572
Other liabilities | (203,654) | (84,228) | (73,107)
Net cash (used in) provided by operating activities | (8,158,298) | (115,590,781) | 11,109,383
Cash flows from investing activities: |  |  |
Capital expenditures | (100,124) | (23,927) | (108,953)
Return of collateral for surety bond | 0 | 1,212,591 | 0
Restricted cash | 0 | 0 | 4,000,000
Net cash (used in) provided by investing activities | (100,124) | 1,188,664 | 3,891,047
Cash flows from financing activities: |  |  |
Issuance of common stock upon exercise of stock options and warrants | 89,498 | 0 | 12,200
Net proceeds from equity rights offering-net of offering costs | 0 | 34,596,468 | 0
Payments for Repurchase of Common Stock | (84,000) | 0 | 0
Payment of employee tax obligations for common stock tendered | (591,067) | (428,009) | 0
Debt issuance costs | 0 | (3,775,546) | 0
Repayment of long-term debt | 0 | 0 | (2,000,000)
Excess tax benefit from stock-based compensation | 0 | 0 | (15,531)
Net cash (used in) provided by financing activities | (585,569) | 30,392,913 | (2,003,331)
Net decrease/increase in cash and cash equivalents | (8,843,991) | (84,009,204) | 12,997,099
Cash and cash equivalents at beginning of period | 28,701,824 | 112,711,028 | 99,713,929
Cash and cash equivalents at end of period | 19,857,833 | 28,701,824 | 112,711,028
Supplemental disclosure of cash flows information: |  |  |
Portion of Term Loan paid directly to PharmAthene by the Lender in satisfaction of the PharmAthene claim; such liability is part of the Liabilities Subject to Compromise line item | 0 | 46,900,000,000,000 | 0
Cash interest paid on PharmAthene liability | 0 | 11,668,900,000,000 | 0
Cash interest paid on Term Loan from restricted cash | 10,288,469,000,000 | 1,222,222,000,000 | 0
Cash income taxes paid (refund) | 325,000,000,000 | 500,975,000,000 | (420,029,000,000)
Fair value of warrant, at issuance date, in connection with loan agreement and recorded as warrant liability | $ 0 | $ 5,832,624,000,000 | $ 0

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- Definition Amount of expense or loss included in net income that result in no cash flow, classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3095-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=SL79508275-113901 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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