Significant Accounting Policies	12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Principles of Consolidation The consolidated financial statements include the accounts of Safeguard (the "Company") and all of its subsidiaries in which a controlling financial interest is maintained. All intercompany accounts and transactions are eliminated in consolidation. Principles of Accounting for Ownership Interests in Companies The Company accounts for its interests in its partner companies using one of the following methods: consolidation, fair value, equity, or cost. The accounting method applied is generally determined by the degree of the Company's influence over the entity, primarily determined by our voting interest in the entity. In addition to holding voting and non-voting equity and debt securities, the Company also periodically makes advances to its partner companies in the form of promissory notes which are included in the Ownership interests in and advances to partner companies line item in the Consolidated Balance Sheets. Consolidation Method. The Company generally accounts for partner companies in which it directly or indirectly owns more than 50% of the outstanding voting securities under the consolidation method of accounting. Under this method, the Company includes the partner companies’ financial statements within the Company’s Consolidated Financial Statements, and all significant intercompany accounts and transactions are eliminated. The Company reflects participation of other stockholders in the net assets and in the income or losses of these consolidated partner companies in Equity in the Consolidated Balance Sheets and in Net income (loss) attributable to non-controlling interest in the Statements of Operations. Net income (loss) attributable to non-controlling interest adjusts the Company’s consolidated operating results to reflect only the Company’s share of the earnings or losses of the consolidated partner company. The Company accounts for results of operations and cash flows of a consolidated partner company through the latest date in which it holds a controlling interest. If the Company subsequently relinquishes control but retains an interest in the partner company, the accounting method is adjusted to the equity, cost or fair value method of accounting, as appropriate. As of December 31, 2014 and for each of the three years in the period then ended, the Company did not hold a controlling interest in any of its partner companies. Fair Value Method. Unrealized gains and losses on the mark-to-market of the Company's holdings in fair value method companies and realized gains and losses on the sale of any holdings in fair value method companies are recognized in Other income (loss), net in the Consolidated Statements of Operations. The Company accounted for its holdings in NuPathe Inc., a former publicly traded partner company, under the fair value method of accounting. As of December 31, 2014, the Company did not account for any of its partner companies under the fair value method. Equity Method. The Company accounts for partner companies whose results are not consolidated, but over which it exercises significant influence, under the equity method of accounting. Whether or not the Company exercises significant influence with respect to a partner company depends on an evaluation of several factors including, among others, representation of the Company on the partner company’s board of directors and the Company’s ownership level, which is generally a 20% to 50% interest in the voting securities of a partner company, including voting rights associated with the Company’s holdings in common, preferred and other convertible instruments in the company. Under the equity method of accounting, the Company does not reflect a partner company’s financial statements within the Company’s Consolidated Financial Statements; however, the Company’s share of the income or loss of such partner company is reflected in Equity income (loss) in the Consolidated Statements of Operations. The Company includes the carrying value of equity method partner companies in Ownership interests in and advances to partner companies on the Consolidated Balance Sheets. Any excess of the Company’s cost over its underlying interest in the net assets of equity method partner companies that is allocated to intangible assets is amortized over the estimated useful lives of the related intangible assets. The Company reflects its share of the income or loss of the equity method partner companies on a one quarter lag. This reporting lag could result in a delay in recognition of the impact of changes in the business or operations of these partner companies. When the Company’s carrying value in an equity method partner company is reduced to zero, the Company records no further losses in its Consolidated Statements of Operations unless the Company has an outstanding guarantee obligation or has committed additional funding to such equity method partner company. When such equity method partner company subsequently reports income, the Company will not record its share of such income until it exceeds the amount of the Company’s share of losses not previously recognized. Cost Method. The Company accounts for partner companies not consolidated or accounted for under the equity method or fair value method under the cost method of accounting. Under the cost method, the Company does not include its share of the income or losses of partner companies in the Company’s Consolidated Statements of Operations. The Company includes the carrying value of cost method partner companies in Ownership interests in and advances to partner companies on the Consolidated Balance Sheets. Accounting Estimates The preparation of the Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America requires management to make estimates and judgments that affect amounts reported in the financial statements and accompanying notes. Actual results may differ from these estimates. These estimates include the evaluation of the recoverability of the Company’s ownership interests in and advances to partner companies and investments in marketable securities, income taxes, stock-based compensation and commitments and contingencies. Management evaluates its estimates on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances. Certain amounts recorded to reflect the Company’s share of income or losses of partner companies accounted for under the equity method are based on unaudited results of operations of those companies and may require adjustments in the future when audits of these entities’ financial statements are completed. It is reasonably possible that the Company’s accounting estimates with respect to the ultimate recoverability of the carrying value of the Company’s ownership interests in and advances to partner companies could change in the near term and that the effect of such changes on the financial statements could be material. At December 31, 2014, the Company believes the carrying value of the Company’s ownership interests in and advances to partner companies is not impaired, although there can be no assurance that the Company’s future results will confirm this assessment, that a significant write-down or write-off will not be required in the future, or that a significant loss will not be recorded in the future upon the sale of a company. Cash and Cash Equivalents and Marketable Securities The Company considers all highly liquid instruments with an original maturity of 90 days or less at the time of purchase to be cash equivalents. Cash and cash equivalents consist of deposits that are readily convertible into cash. The Company determines the appropriate classification of marketable securities at the time of purchase and reevaluates such designation as of each balance sheet date. Held-to-maturity securities are carried at amortized cost, which approximates fair value. Marketable securities consist of held-to-maturity securities, primarily consisting of government agency bonds, commercial paper and certificates of deposits. Marketable securities with a maturity date greater than one year from the balance sheet date are considered long-term. The Company has not experienced any significant losses on cash equivalents and does not believe it is exposed to any significant credit risk on cash and cash equivalents. Financial Instruments The Company’s financial instruments (principally cash and cash equivalents, marketable securities, accounts receivable, notes receivable, accounts payable and accrued expenses) are carried at cost, which approximates fair value due to the short-term maturity of these instruments. The Company’s long-term debt is carried at cost. Accounting for Participating Interests in Mezzanine Loans Receivable and Related Equity Interests The Company’s participating interests in Penn Mezzanine loans are included in Loan participations receivable on the Consolidated Balance Sheets. On a periodic basis, but no less frequently than at the end of each quarter, the Company evaluates the carrying value of each loan participation receivable for impairment. A loan participation receivable is considered impaired when it is probable that the Company will be unable to collect all amounts (principal and interest) due according to the contractual terms of the participation agreement and related agreements with the borrowers. The Company maintains an allowance to provide for estimated loan losses based on evaluating known and inherent risks in the loans. The allowance is provided based upon management’s analysis of the pertinent factors underlying the quality of the loans. These factors include an analysis of the financial condition of the individual borrowers, delinquency levels, actual loan loss experience, current economic conditions and other relevant factors. The Company’s analysis includes methods to estimate the fair value of loan collateral and the existence of potential alternative sources of repayment. The Company does not accrue interest when a loan is considered impaired. All cash receipts from an impaired loan are applied to reduce the original principal amount of such loan until the principal has been fully recovered and would be recognized as interest income thereafter. The Company’s participation in equity interests acquired by Penn Mezzanine is accounted for under the cost method of accounting. On a periodic basis, but no less frequently than at the end of each quarter, the Company evaluates the carrying value of its participation in these equity interests for possible impairment based on achievement of business plan objectives and milestones, the fair value of the equity interest relative to its carrying value, the financial condition and prospects of the underlying company and other relevant factors. The Company’s participating interests in equity interests acquired by Penn Mezzanine are included in Other assets on the Consolidated Balance Sheets. Impairment of Ownership Interests In and Advances to Partner Companies On a periodic basis, but no less frequently than quarterly, the Company evaluates the carrying value of its equity and cost method partner companies for possible impairment based on achievement of business plan objectives and milestones, the fair value of each partner company relative to its carrying value, the financial condition and prospects of the partner company and other relevant factors. The business plan objectives and milestones the Company considers include, among others, those related to financial performance, such as achievement of planned financial results or completion of capital raising activities, and those that are not primarily financial in nature, such as hiring of key employees or the establishment of strategic relationships. Management then determines whether there has been an other than temporary decline in the value of its ownership interest in the company. Impairment is measured as the amount by which the carrying value of an asset exceeds its fair value. The fair value of privately held companies is generally determined based on the value at which independent third parties have invested or have committed to invest in these companies or based on other valuation methods, including discounted cash flows, valuation of comparable public companies and the valuation of acquisitions of similar companies. Impairment charges related to equity method partner companies are included in Equity income (loss) in the Consolidated Statements of Operations. Impairment charges related to cost method partner companies and funds are included in Other income (loss), net in the Consolidated Statements of Operations. The reduced cost basis of a previously impaired partner company is not written-up if circumstances suggest the value of the company has subsequently recovered. Income Taxes The Company accounts for income taxes under the asset and liability method whereby deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. The Company measures deferred tax assets and liabilities using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled. The Company recognizes the effect on deferred tax assets and liabilities of a change in tax rates in income in the period of the enactment date. The Company provides a valuation allowance against the net deferred tax asset for amounts which are not considered more likely than not to be realized. Net Income (Loss) Per Share The Company computes net income (loss) per share using the weighted average number of common shares outstanding during each year. The Company includes in diluted net income (loss) per share common stock equivalents (unless anti-dilutive) which would arise from the exercise of stock options and conversion of other convertible securities and adjusted, if applicable, for the effect on net income (loss) of such transactions. Diluted net income (loss) per share calculations adjust net income (loss) for the dilutive effect of common stock equivalents and convertible securities issued by the Company’s consolidated or equity method partner companies. Segment Information The Company reports segment data based on the management approach which designates the internal reporting used by management for making operating decisions and assessing performance as the source of the Company’s reportable operating segments.

Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include the accounts of Safeguard (the "Company") and all of its subsidiaries in which a controlling financial interest is maintained. All intercompany accounts and transactions are eliminated in consolidation.

Principles of Accounting for Ownership Interests in Companies

The Company accounts for its interests in its partner companies using one of the following methods: consolidation, fair value, equity, or cost. The accounting method applied is generally determined by the degree of the Company's influence over the entity, primarily determined by our voting interest in the entity.

In addition to holding voting and non-voting equity and debt securities, the Company also periodically makes advances to its partner companies in the form of promissory notes which are included in the Ownership interests in and advances to partner companies line item in the Consolidated Balance Sheets.

Consolidation Method. The Company generally accounts for partner companies in which it directly or indirectly owns more than 50% of the outstanding voting securities under the consolidation method of accounting. Under this method, the Company includes the partner companies’ financial statements within the Company’s Consolidated Financial Statements, and all significant intercompany accounts and transactions are eliminated. The Company reflects participation of other stockholders in the net assets and in the income or losses of these consolidated partner companies in Equity in the Consolidated Balance Sheets and in Net income (loss) attributable to non-controlling interest in the Statements of Operations. Net income (loss) attributable to non-controlling interest adjusts the Company’s consolidated operating results to reflect only the Company’s share of the earnings or losses of the consolidated partner company. The Company accounts for results of operations and cash flows of a consolidated partner company through the latest date in which it holds a controlling interest. If the Company subsequently relinquishes control but retains an interest in the partner company, the accounting method is adjusted to the equity, cost or fair value method of accounting, as appropriate. As of December 31, 2014 and for each of the three years in the period then ended, the Company did not hold a controlling interest in any of its partner companies.

Fair Value Method. Unrealized gains and losses on the mark-to-market of the Company's holdings in fair value method companies and realized gains and losses on the sale of any holdings in fair value method companies are recognized in Other income (loss), net in the Consolidated Statements of Operations. The Company accounted for its holdings in NuPathe Inc., a former publicly traded partner company, under the fair value method of accounting. As of December 31, 2014, the Company did not account for any of its partner companies under the fair value method.

Equity Method. The Company accounts for partner companies whose results are not consolidated, but over which it exercises significant influence, under the equity method of accounting. Whether or not the Company exercises significant influence with respect to a partner company depends on an evaluation of several factors including, among others, representation of the Company on the partner company’s board of directors and the Company’s ownership level, which is generally a 20% to 50% interest in the voting securities of a partner company, including voting rights associated with the Company’s holdings in common, preferred and other convertible instruments in the company. Under the equity method of accounting, the Company does not reflect a partner company’s financial statements within the Company’s Consolidated Financial Statements; however, the Company’s share of the income or loss of such partner company is reflected in Equity income (loss) in the Consolidated Statements of Operations. The Company includes the carrying value of equity method partner companies in Ownership interests in and advances to partner companies on the Consolidated Balance Sheets. Any excess of the Company’s cost over its underlying interest in the net assets of equity method partner companies that is allocated to intangible assets is amortized over the estimated useful lives of the related intangible assets. The Company reflects its share of the income or loss of the equity method partner companies on a one quarter lag. This reporting lag could result in a delay in recognition of the impact of changes in the business or operations of these partner companies.

When the Company’s carrying value in an equity method partner company is reduced to zero, the Company records no further losses in its Consolidated Statements of Operations unless the Company has an outstanding guarantee obligation or has committed additional funding to such equity method partner company. When such equity method partner company subsequently reports income, the Company will not record its share of such income until it exceeds the amount of the Company’s share of losses not previously recognized.

Cost Method. The Company accounts for partner companies not consolidated or accounted for under the equity method or fair value method under the cost method of accounting. Under the cost method, the Company does not include its share of the income or losses of partner companies in the Company’s Consolidated Statements of Operations. The Company includes the carrying value of cost method partner companies in Ownership interests in and advances to partner companies on the Consolidated Balance Sheets.

Accounting Estimates

The preparation of the Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America requires management to make estimates and judgments that affect amounts reported in the financial statements and accompanying notes. Actual results may differ from these estimates. These estimates include the evaluation of the recoverability of the Company’s ownership interests in and advances to partner companies and investments in marketable securities, income taxes, stock-based compensation and commitments and contingencies. Management evaluates its estimates on an ongoing basis using historical experience and other factors, including the current economic environment, which management believes to be reasonable under the circumstances.

Certain amounts recorded to reflect the Company’s share of income or losses of partner companies accounted for under the equity method are based on unaudited results of operations of those companies and may require adjustments in the future when audits of these entities’ financial statements are completed.

It is reasonably possible that the Company’s accounting estimates with respect to the ultimate recoverability of the carrying value of the Company’s ownership interests in and advances to partner companies could change in the near term and that the effect of such changes on the financial statements could be material. At December 31, 2014, the Company believes the carrying value of the Company’s ownership interests in and advances to partner companies is not impaired, although there can be no assurance that the Company’s future results will confirm this assessment, that a significant write-down or write-off will not be required in the future, or that a significant loss will not be recorded in the future upon the sale of a company.

Cash and Cash Equivalents and Marketable Securities

The Company considers all highly liquid instruments with an original maturity of 90 days or less at the time of purchase to be cash equivalents. Cash and cash equivalents consist of deposits that are readily convertible into cash. The Company determines the appropriate classification of marketable securities at the time of purchase and reevaluates such designation as of each balance sheet date. Held-to-maturity securities are carried at amortized cost, which approximates fair value. Marketable securities consist of held-to-maturity securities, primarily consisting of government agency bonds, commercial paper and certificates of deposits. Marketable securities with a maturity date greater than one year from the balance sheet date are considered long-term. The Company has not experienced any significant losses on cash equivalents and does not believe it is exposed to any significant credit risk on cash and cash equivalents.

Financial Instruments

The Company’s financial instruments (principally cash and cash equivalents, marketable securities, accounts receivable, notes receivable, accounts payable and accrued expenses) are carried at cost, which approximates fair value due to the short-term maturity of these instruments. The Company’s long-term debt is carried at cost.

Accounting for Participating Interests in Mezzanine Loans Receivable and Related Equity Interests

The Company’s participating interests in Penn Mezzanine loans are included in Loan participations receivable on the Consolidated Balance Sheets. On a periodic basis, but no less frequently than at the end of each quarter, the Company evaluates the carrying value of each loan participation receivable for impairment. A loan participation receivable is considered impaired when it is probable that the Company will be unable to collect all amounts (principal and interest) due according to the contractual terms of the participation agreement and related agreements with the borrowers. The Company maintains an allowance to provide for estimated loan losses based on evaluating known and inherent risks in the loans. The allowance is provided based upon management’s analysis of the pertinent factors underlying the quality of the loans. These factors include an analysis of the financial condition of the individual borrowers, delinquency levels, actual loan loss experience, current economic conditions and other relevant factors. The Company’s analysis includes methods to estimate the fair value of loan collateral and the existence of potential alternative sources of repayment. The Company does not accrue interest when a loan is considered impaired. All cash receipts from an impaired loan are applied to reduce the original principal amount of such loan until the principal has been fully recovered and would be recognized as interest income thereafter.

The Company’s participation in equity interests acquired by Penn Mezzanine is accounted for under the cost method of accounting. On a periodic basis, but no less frequently than at the end of each quarter, the Company evaluates the carrying value of its participation in these equity interests for possible impairment based on achievement of business plan objectives and milestones, the fair value of the equity interest relative to its carrying value, the financial condition and prospects of the underlying company and other relevant factors. The Company’s participating interests in equity interests acquired by Penn Mezzanine are included in Other assets on the Consolidated Balance Sheets.

Impairment of Ownership Interests In and Advances to Partner Companies

On a periodic basis, but no less frequently than quarterly, the Company evaluates the carrying value of its equity and cost method partner companies for possible impairment based on achievement of business plan objectives and milestones, the fair value of each partner company relative to its carrying value, the financial condition and prospects of the partner company and other relevant factors. The business plan objectives and milestones the Company considers include, among others, those related to financial performance, such as achievement of planned financial results or completion of capital raising activities, and those that are not primarily financial in nature, such as hiring of key employees or the establishment of strategic relationships. Management then determines whether there has been an other than temporary decline in the value of its ownership interest in the company. Impairment is measured as the amount by which the carrying value of an asset exceeds its fair value.

The fair value of privately held companies is generally determined based on the value at which independent third parties have invested or have committed to invest in these companies or based on other valuation methods, including discounted cash flows, valuation of comparable public companies and the valuation of acquisitions of similar companies.

Impairment charges related to equity method partner companies are included in Equity income (loss) in the Consolidated Statements of Operations. Impairment charges related to cost method partner companies and funds are included in Other income (loss), net in the Consolidated Statements of Operations.

The reduced cost basis of a previously impaired partner company is not written-up if circumstances suggest the value of the company has subsequently recovered.

Income Taxes

The Company accounts for income taxes under the asset and liability method whereby deferred tax assets and liabilities are recognized for the estimated future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. The Company measures deferred tax assets and liabilities using enacted tax rates in effect for the year in which the temporary differences are expected to be recovered or settled. The Company recognizes the effect on deferred tax assets and liabilities of a change in tax rates in income in the period of the enactment date. The Company provides a valuation allowance against the net deferred tax asset for amounts which are not considered more likely than not to be realized.

Net Income (Loss) Per Share

The Company computes net income (loss) per share using the weighted average number of common shares outstanding during each year. The Company includes in diluted net income (loss) per share common stock equivalents (unless anti-dilutive) which would arise from the exercise of stock options and conversion of other convertible securities and adjusted, if applicable, for the effect on net income (loss) of such transactions. Diluted net income (loss) per share calculations adjust net income (loss) for the dilutive effect of common stock equivalents and convertible securities issued by the Company’s consolidated or equity method partner companies.

Segment Information

The Company reports segment data based on the management approach which designates the internal reporting used by management for making operating decisions and assessing performance as the source of the Company’s reportable operating segments.