Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation The condensed consolidated financial statements contained in this report are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results for the interim periods of the fiscal years ending December 31, 2019 and 2018. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, the accompanying unaudited condensed consolidated financial statements should be read in conjunction with the notes to the audited consolidated financial statements contained in the Company’s Form 10-K for the year ended December 31, 2018, as filed with the Securities and Exchange Commission on April 1, 2019. Principles of Consolidation The condensed consolidated financial statements include the accounts of Teligent, Inc. and its wholly-owned and majority-owned subsidiaries. All inter-company accounts and transactions have been eliminated. The Company consolidated the following entities: Igen, Inc., Teligent Pharma. Inc., Teligent Luxembourg S.à.r.l., Teligent OÜ, Teligent Canada Inc., and Teligent Jersey Limited., in addition to the following inactive entities: Microburst Energy, Inc., Blood Cells, Inc. and Flavorsome, Ltd.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with 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. Significant estimates include sales returns and allowances, allowances for excess and obsolete inventories, allowances for doubtful accounts, provisions for income taxes and related valuation allowances, stock based compensation, the assessment for the impairment of long-lived assets (including intangibles, goodwill and property, plant and equipment) and legal accruals for environmental cleanup and remediation costs. Actual results could differ from those estimates.
Cash Equivalents	Cash Equivalents The Company considers all highly liquid instruments purchased with the original maturity of three months or less to be cash equivalents to the extent the funds are not being held for investment purposes. Cash and cash equivalents include cash on hand and bank demand deposits used in the Company’s cash management program.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying amounts of cash and cash equivalents, trade receivables, restricted cash, accounts payable and other accrued liabilities at March 31, 2019 approximate their fair value for all periods presented. The Company measures fair value in accordance with ASC 820-10, “Fair Value Measurements and Disclosures”. ASC 820-10 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, ASC 820-10 establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date. Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.
Loss Per Common Share	Loss Per Common Share Basic loss per share of common stock is computed based on the weighted average number of shares of common stock outstanding during the period. Diluted loss per share of common stock is computed using the weighted average number of shares of common stock and potential dilutive common stock equivalents outstanding during the period. Potential dilutive common stock equivalents include shares issuable upon the conversion of the notes and the exercise of options and warrants.
Concentration of Credit Risk	Concentration of Credit Risk Major customers of the Company are defined as those constituting greater than 10% of the Company's total revenue.
Recently Adopted Accounting Pronouncements/Recently Issued Not Yet Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which supersedes the existing lease guidance under Topic 840. The new standard requires lessees to recognize Right-of-Use ("ROU") assets and lease liabilities for all leases with terms greater than 12 months, including those leases that were previously classified as operating leases. Topic 842 retains a distinction between finance leases and operating leases, with measurement and presentation of expenses and cash flows being dependent upon the classification. The Company adopted the new standard effective January 1, 2019 utilizing the optional transition method allowed under ASU 2018-11, Leases (Topic 842): Targeted Improvements. See Note 7 for the Company's additional required disclosures under Topic 842. In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. This guidance is effective for all entities for fiscal years, and interim periods within those years, beginning after December 15, 2018, with early adoption permitted. The amendments in ASU 2018-02 should be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company's adoption of this ASU, effective January 1, 2019, did not have a material impact on its condensed consolidated financial statements. Recently Issued Not Yet Adopted Accounting Pronouncements In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): “Simplifying the Test for Goodwill Impairment”. The update simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. For the Company, the amendments are effective January 1, 2020. The Company is currently evaluating the impact of this ASU on its condensed consolidated financial statements. In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): “Clarifying the Interaction between Topic 808 and Topic 606”. The guidance clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaborative arrangement participant is a customer. For the Company, the amendment will be effective January 1, 2020. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2019

Basis of Presentation and Principles of Consolidation

Basis of Presentation

The condensed consolidated financial statements contained in this report are unaudited. In the opinion of management, the condensed consolidated financial statements include all adjustments, which are of a normal recurring nature, necessary for a fair presentation of the results for the interim periods of the fiscal years ending December 31, 2019 and 2018. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted. Accordingly, the accompanying unaudited condensed consolidated financial statements should be read in conjunction with the notes to the audited consolidated financial statements contained in the Company’s Form 10-K for the year ended December 31, 2018, as filed with the Securities and Exchange Commission on April 1, 2019.

Principles of Consolidation

The condensed consolidated financial statements include the accounts of Teligent, Inc. and its wholly-owned and majority-owned subsidiaries. All inter-company accounts and transactions have been eliminated. The Company consolidated the following entities: Igen, Inc., Teligent Pharma. Inc., Teligent Luxembourg S.à.r.l., Teligent OÜ, Teligent Canada Inc., and Teligent Jersey Limited., in addition to the following inactive entities: Microburst Energy, Inc., Blood Cells, Inc. and Flavorsome, Ltd.

Use of Estimates

The preparation of financial statements in conformity with 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. Significant estimates include sales returns and allowances, allowances for excess and obsolete inventories, allowances for doubtful accounts, provisions for income taxes and related valuation allowances, stock based compensation, the assessment for the impairment of long-lived assets (including intangibles, goodwill and property, plant and equipment) and legal accruals for environmental cleanup and remediation costs. Actual results could differ from those estimates.

Cash Equivalents

The Company considers all highly liquid instruments purchased with the original maturity of three months or less to be cash equivalents to the extent the funds are not being held for investment purposes. Cash and cash equivalents include cash on hand and bank demand deposits used in the Company’s cash management program.

Fair Value of Financial Instruments

The carrying amounts of cash and cash equivalents, trade receivables, restricted cash, accounts payable and other accrued liabilities at March 31, 2019 approximate their fair value for all periods presented. The Company measures fair value in accordance with ASC 820-10, “Fair Value Measurements and Disclosures”. ASC 820-10 clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, ASC 820-10 establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:

Level 1 Inputs: Unadjusted quoted prices in active markets for identical assets or liabilities accessible to the reporting entity at the measurement date.

Level 2 Inputs: Other than quoted prices included in Level 1 inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability.

Level 3 Inputs: Unobservable inputs for the asset or liability used to measure fair value to the extent that observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at measurement date. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

Loss Per Common Share

Basic loss per share of common stock is computed based on the weighted average number of shares of common stock outstanding during the period. Diluted loss per share of common stock is computed using the weighted average number of shares of common stock and potential dilutive common stock equivalents outstanding during the period. Potential dilutive common stock equivalents include shares issuable upon the conversion of the notes and the exercise of options and warrants.

Concentration of Credit Risk

Major customers of the Company are defined as those constituting greater than 10% of the Company's total revenue.

Recently Adopted Accounting Pronouncements/Recently Issued Not Yet Adopted Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which supersedes the existing lease guidance under Topic 840. The new standard requires lessees to recognize Right-of-Use ("ROU") assets and lease liabilities for all leases with terms greater than 12 months, including those leases that were previously classified as operating leases. Topic 842 retains a distinction between finance leases and operating leases, with measurement and presentation of expenses and cash flows being dependent upon the classification. The Company adopted the new standard effective January 1, 2019 utilizing the optional transition method allowed under ASU 2018-11, Leases (Topic 842): Targeted Improvements. See Note 7 for the Company's additional required disclosures under Topic 842.

In February 2018, the FASB issued ASU 2018-02, “Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income,” which allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. This guidance is effective for all entities for fiscal years, and interim periods within those years, beginning after December 15, 2018, with early adoption permitted. The amendments in ASU 2018-02 should be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. The Company's adoption of this ASU, effective January 1, 2019, did not have a material impact on its condensed consolidated financial statements.

Recently Issued Not Yet Adopted Accounting Pronouncements

In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): “Simplifying the Test for Goodwill Impairment”. The update simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. For the Company, the amendments are effective January 1, 2020. The Company is currently evaluating the impact of this ASU on its condensed consolidated financial statements.

In November 2018, the FASB issued ASU 2018-18, Collaborative Arrangements (Topic 808): “Clarifying the Interaction between Topic 808 and Topic 606”. The guidance clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue under Topic 606 when the collaborative arrangement participant is a customer. For the Company, the amendment will be effective January 1, 2020. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements.