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Loan Payable | 12 Months Ended
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Dec. 31, 2015
Debt Disclosure [Abstract] |
Loan Payable | Note 14. Loan Payable Loan Agreement with Silicon Valley Bank In April 2013, we entered into a Loan Agreement with Silicon Valley Bank (SVB) and received loan proceeds of $9,900,000, net of a $100,000 cash discount. The loan proceeds will be used for research and development and general corporate purposes. The loan has a three-year term and bears interest at an annual rate of 6%. The loan obligations are secured by a first priority security interest on substantially all of our assets excluding intellectual property. For the first six months, payments will be interest only followed by repayment of principal and interest over a period of 30 months. There is also a final $1,000,000 fee payable at the end of the term which is being expensed over the term of the loan using the effective interest method. In conjunction with the Loan Agreement, we issued to SVB a ten year warrant to acquire 293,531 shares of common stock at an exercise price of $1.7034 per share. The warrant is immediately exercisable and expires in April 2023. We estimated the fair value of the warrant to be approximately $388,000 using the Black-Scholes option pricing model with the following assumptions:
Expected life (years) |  |  | 10 |
Risk-free interest rate |  |  | 1.9 | %
Expected volatility |  |  | 88.1 | %
Expected dividend yield |  |  | 0 | %
We applied the relative fair value method to allocate the $9,900,000 net proceeds between the loan and warrant. The approximately $388,000 fair value allocated to the warrant was recorded as an increase to additional paid-in capital and as a discount to loan payable. Approximately $9,512,000 was assigned to the loan and was recorded as the initial carrying amount of the loan payable, net of discount. The approximately $388,000 fair value of the warrant and the $100,000 cash discount are both being amortized as additional interest expense over the term of the loan using the effective interest rate method. We also incurred loan issuance costs of approximately $117,000, which are recorded as deferred financing costs on the accompanying consolidated balance sheet and are being amortized to interest expense over the term of the Loan Agreement using the effective interest rate method. The effective interest rate used to amortize the deferred financing costs and the discount (including the fair value of the warrant and the cash discount), and for the accretion of the final payment, is 9.0%. We are required to maintain certain financial and other covenants set forth in the Loan Agreement. In December 2015, to remain in compliance with the terms of the agreement, we entered into an amendment to the Loan Agreement that required us to maintain with SVB a restricted money market account with a minimum aggregate balance of $2,422,500. As part of the amendment, we pledged to SVB a security interest in the restricted money market account. The pledged restricted money market account will be released on the earlier of date we repay the outstanding principal, interest and fees or (i) we receive at least $18,000,000 of net new cash proceeds from investors on terms and conditions reasonably acceptable to SVB and (ii) we have cash and cash equivalents at SVB sufficient to support six months operations. Loan Agreement with California Institute for Regenerative Medicine In April 2013, we entered into an agreement with the CIRM under which CIRM would have provided up to approximately $19.3 million as a forgivable loan, in accordance with mutually agreed upon terms and conditions and CIRM regulations. The CIRM loan was to have helped fund preclinical development of our HuCNS-SC cells for Alzheimer’s disease. Between July 2013 and August 2014, we received in aggregate, approximately $9.6 million as disbursements of the loan provided under the CIRM Loan Agreement. However in December 2014, as findings under this pre-clinical study in Alzheimer’s disease did not meet pre-determined criteria for ongoing funding for this program by CIRM, we decided to wind down this pre-clinical study which had been funded in part by the CIRM loan agreement. Under the terms of the CIRM loan agreement, principal amount of approximately $8,917,000 and accrued interest of approximately $243,000 were forgiven. However, authoritative accounting guidance requires certain conditions (which includes a legal release from the creditor) to be met before a liability can be extinguished and derecognized. In February 2015, we repaid CIRM approximately $679,000 of the aggregate loan proceeds received. The following table is a summary of the changes in the carrying value of our loan payable in 2015:
|  | Silicon Valley Bank Loan |  |  | CIRM Loan |  |  | Total |
Loan payable at December 31, 2014 |  | $ | 5,424,610 |  |  | $ | 9,595,807 |  |  | $ | 15,020,417 |
Repayment of principal |  |  | (4,099,319 | ) |  |  | (679,166 | ) |  |  | (4,778,485 | )
Accretion of discount |  |  | 92,097 |  |  |  | — |  |  |  | 92,097 |
Carrying value of loan payable at 12/31/2015 (current and non-current) |  | $ | 1,417,388 |  |  | $ | 8,916,641 |  |  | $ | 10,334,029 |
Carrying value of loan payable, current portion |  | $ | 1,417,388 |  |  | $ | — |  |  | $ | 1,417,388 |
Carrying value of loan payable, non-current portion |  |  | — |  |  |  | 8,916,641 |  |  |  | 8,916,641 |
Total loan payable at December 31, 2015 |  | $ | 1,417,388 |  |  | $ | 8,916,641 |  |  | $ | 10,334,029 |

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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