Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies Basis of Presentation Our consolidated financial statements include our accounts and the accounts for our wholly owned subsidiary, Rockwell Transportation, Inc. All intercompany balances and transactions have been eliminated in consolidation. The accompanying consolidated financial statements have been prepared using accounting principles generally accepted in the United States of America, or “GAAP,” and with the instructions to Form 10-Q and Securities and Exchange Commission Regulation S-X as they apply to interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The balance sheet at December 31, 2014 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of our management, all adjustments have been included that are necessary to make the financial statements not misleading. All of these adjustments that are material are of a normal and recurring nature. Our operating results for the three and nine months ended September 30, 2015 are not necessarily indicative of the results to be expected for the year ending December 31, 2015. You should read our unaudited interim financial statements together with the financial statements and related footnotes for the year ended December 31, 2014 included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2014. Our Annual Report on Form 10-K for the fiscal year ended December 31, 2014 includes a description of our significant accounting policies. Revenue Recognition We recognize revenue at the time we transfer title to our products to our customers consistent with generally accepted accounting principles. Generally, we recognize revenue when our products are delivered to our customer’s location consistent with our terms of sale. We recognize revenue for international shipments when title has transferred consistent with standard terms of sale. The initial payment of $20 million received pursuant to our long-term Distribution Agreement (the “Distribution Agreement”) with Baxter Healthcare Corporation (“Baxter”) in October 2014 has been accounted for as deferred license revenue. Deferred license revenue is being recognized based on the proportion of product shipments to Baxter in each period to total expected sales volume for the term of the agreement. We require certain customers, mostly international customers, to pay for product prior to the transfer of title to the customer. Deposits received from customers and payments in advance for orders are recorded as liabilities under Customer Deposits until such time as orders are filled and title transfers to the customer consistent with our terms of sale. Cash and Cash Equivalents We consider cash on hand, money market funds, unrestricted certificates of deposit and short term marketable securities with an original maturity of 90 days or less as cash and cash equivalents. Investments Available for Sale Investments Available for Sale are investments in short term duration bond funds, and are stated at fair value based upon observed market prices (Level 1 in the fair value hierarchy). These funds generally hold high credit quality short term debt instruments. These instruments are subject to changes in fair market value due primarily to changes in interest rates. The fair value of these investments was $39,818,118 as of September 30, 2015. Unrealized holding gains or losses on these securities are included in accumulated other comprehensive income (loss). Realized gains and losses, including declines in value judged to be other-than-temporary on available-for-sale securities are included as a component of other income or expense. Realized losses from repositioning our portfolio aggregated $58,095 for the nine months ended September 30, 2015. Gross unrealized gains were $18,493 and gross unrealized losses were $598,603 as of September 30, 2015. The Company has evaluated the near term interest rate environment and the expected holding period of the investments along with the duration of the fund portfolios in assessing the severity and duration of the potential impairment. Based on that evaluation the Company does not consider those investments to be other-than-temporarily impaired at September 30, 2015. Research and Product Development We recognize research and product development expenses as incurred. We incurred product development and research costs related to the commercial development, patent approval and regulatory approval of new products, including our FDA approved iron maintenance therapy drug, Triferic™, aggregating approximately $1.2 million and $1.3 million for the three months ended September 30, 2015 and 2014, respectively. Research and product development costs were $2.9 million and $6.1 million for the nine months ended September 30, 2015 and 2014, respectively. Share Based Compensation We measure the cost of employee services received in exchange for equity awards, including stock options, based on the grant date fair value of the awards in accordance with ASC 718-10, Compensation — Stock Compensation. The cost of equity based compensation is recognized as compensation expense over the vesting period of the awards. We estimate the fair value of compensation involving stock options utilizing the Black-Scholes option pricing model. This model requires the input of several factors such as the expected option term, expected volatility of our stock price over the expected option term, and an expected forfeiture rate, and is subject to various assumptions. We believe the valuation methodology is appropriate for estimating the fair value of stock options we grant to employees and directors which are subject to ASC 718-10 requirements. These amounts are estimates and thus may not be reflective of actual future results or amounts ultimately realized by recipients of these grants. The Company’s Long Term Incentive Plan permits grantees to tender shares to the Company in satisfaction of liabilities related to the exercise of equity awards, including the exercise price of options and tax liabilities related to equity awards. During the first nine months of 2015, 290,128 shares were tendered to the Company in satisfaction of $2,912,859 of such liabilities. Net Earnings Per Share We computed our basic earnings (loss) per share using weighted average shares outstanding for each respective period. Diluted earnings per share also reflect the weighted average impact from the date of issuance of all potentially dilutive securities, consisting of stock options and common share purchase warrants, unless inclusion would have had an anti-dilutive effect. The calculation of basic weighted average shares outstanding excludes unvested restricted stock. Actual weighted average shares outstanding used in calculating basic and diluted earnings per share were: Three Months Ended Three Months Ended Nine Months Ended Nine Months Ended September 30, 2015 September 30, 2014 September 30, 2015 September 30, 2014 Basic Weighted Average Shares Outstanding Effect of Dilutive Securities — — — — Diluted Weighted Average Shares Outstanding |