Significant Accounting Policies and Basis of Presentation
12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Significant Accounting Policies [Text Block]
Note 2. Significant Accounting Policies and Basis of Presentation
 
Basis of Presentation and Liquidity
Our consolidated financial statements have been prepared in accordance with U.S. GAAP.  The financial statements include the accounts of the Company and our wholly owned subsidiary.  All significant intercompany transactions and balances have been eliminated.
 
The Company's operations currently do not generate significant cash.  The Company's management does not know when this will change.  The Company has spent and will continue to spend substantial funds in the research, development, clinical and pre-clinical testing of the Company's stem cell and small molecule product candidates with the goal of ultimately obtaining approval from the United States Food and Drug Administration (the “FDA”), to market and sell our products.  While we believe our long-term cash position is inadequate to fund all of the costs associated with the full range of testing and clinical trials required by the FDA for our core product candidates, we anticipate that our available cash and expected income will be sufficient to finance our current activities at least through December 31, 2014. 
 
No assurance can be given that (i) we will be able to expand our operations prior to FDA approval of our products, or (ii) FDA approval will ever be granted for our product candidates.
 
Use of Estimates
The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  The financial statements include significant estimates for the value and expected economic life of our patent technology, our net operating loss carryforward for tax purposes, the fair value of our derivative instruments and our share-based compensation related to employees and directors, consultants and investment banks, among other things.  Because of the use of estimates inherent in the financial reporting process, actual results could differ significantly from those estimates.
 
Fair Value Measurements
The carrying amounts of our short-term financial instruments, which primarily include cash and cash equivalents, accounts payable and certain accrued expenses, approximate their fair values due to their short maturities. The fair value of our long-term indebtedness is estimated based on the quoted prices for the same or similar issues or on the current interest rates offered to the Company for debt of the same remaining maturities.  The fair values of our derivative instruments and certain other accrued expenses are estimated using level 3 unobservable inputs.  See Note 3 for further details.
 
Foreign Currency Translation
The functional currency of our wholly owned foreign subsidiary is its local currency.  Assets and liabilities of our foreign subsidiary are translated into United States dollars based on exchange rates at the end of the reporting period; income and expense items are translated at the weighted average exchange rates prevailing during the reporting period.  Translation adjustments for subsidiaries that have not been sold, substantially liquidated or otherwise disposed of are accumulated in other comprehensive income or loss, a component of stockholders' equity.   Transaction gains or losses are included in the determination of net loss.
 
Cash, Cash Equivalents and Credit Risk
Cash deposited with banks and other financial institutions may exceed the amount of insurance provided on such deposits. If the amount of a deposit at any time exceeds the federally insured amount at a bank, the uninsured portion of the deposit could be lost, in whole or in part, if the bank were to fail.
 
Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash equivalents.  Cash equivalents consist of investments in low risk, highly liquid money market funds and certificates of deposit with original maturities of 90 days or less. Our investment policy, approved by our Board of Directors, limits the amount we may invest in any one type of investment thereby reducing credit risk concentrations.  We limit our credit and liquidity risks through our investment policy and through regular reviews of our portfolio against our policy.  To date, we have not experienced any loss or lack of access to cash in our operating accounts or to our cash equivalents.
 
Revenue Recognition
Historically, our revenue has been derived primarily from (i) selling treated samples for gene expression data from stem cell experiments, (ii) providing services under various contracts and grants and (iii) licensing the use of our intellectual property to third parties.  Revenue is recognized when there is persuasive evidence that an arrangement exists, delivery of goods and services has occurred, the price is fixed and determinable, and collection is reasonably assured. 
 
Research and Development
Research and development costs are expensed as they are incurred. Research and development expenses consist primarily of costs associated with pre-clinical development of treatments for central nervous system diseases, and with our clinical trials for both pharmaceutical and stem cell based treatments.  
 
Income (Loss) per Common Share
Basic income (loss) per common share is computed by dividing total net income (loss) available to common shareholders by the weighted average number of common shares outstanding during the period. 
 
For periods of net income when the effects of potential common shares are dilutive, diluted earnings per share is computed by dividing net income available to common shareholders by the weighted average number of shares outstanding and the dilutive impact of dilutive potential common shares. Dilutive potential common shares consist primarily of stock options, restricted share units and stock warrants. The dilutive impact of potential common shares resulting from common stock equivalents is determined by applying the treasury stock method. The Company’s unvested restricted shares contain non-forfeitable rights to dividends, and therefore are considered to be participating securities; the calculation of basic and diluted income per share excludes net income attributable to the unvested restricted shares from the numerator and excludes the impact of the shares from the denominator.
 
For all periods of net loss, diluted loss per share is calculated similarly to basic loss per share because the impact of all dilutive potential common shares is anti-dilutive due to the net losses; accordingly, diluted loss per share is the same as basic loss per share for the years ended December 31, 2013, 2012 and 2011.  A total of approximately 38.2, 35.0 and 24.5 million potential dilutive shares have been excluded in the calculation of diluted net income per share for the years ended December 31, 2013, 2012 and 2011, respectively as their inclusion would be anti-dilutive. 
 
Share-Based Compensation
We account for share-based compensation at fair value. Share-based compensation cost for stock options and warrants granted to employees, board members and service providers is determined at the grant date using an option pricing model that uses level 3 unobservable inputs; share-based compensation cost for restricted stock and restricted stock units granted to employees and board members is determined at the grant date based on the closing price of our common stock on that date.  The value of the award that is ultimately expected to vest is recognized as expense on a straight-line basis over the requisite service period.
 
Intangible and Long-Lived Assets
We assess impairment of our long-lived assets using a "primary asset" approach to determine the cash flow estimation period for a group of assets and liabilities that represents the unit of accounting for a long-lived asset to be held and used. Long-lived assets to be held and used are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. The carrying amount of a long-lived asset is not recoverable if it exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset. No significant impairment losses were recognized during the years ended December 31, 2013, 2012 and 2011.
 
Income Taxes
We account for income taxes using the asset and liability approach, which requires the recognition of future tax benefits or liabilities on the temporary differences between the financial reporting and tax bases of our assets and liabilities. A valuation allowance is established when necessary to reduce deferred tax assets to the amounts expected to be realized. We also recognize a tax benefit from uncertain tax positions only if it is “more likely than not” that the position is sustainable based on its technical merits. Our policy is to recognize interest and penalties on uncertain tax positions as a component of income tax expense. 
 
Significant New Accounting Pronouncements
We have evaluated all Accounting Standards Updates through the date the financial statements were issued and believe the adoption of any new accounting and disclosure requirements will not have a material impact to our results of operations or financial position.