Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2020
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, 2020 and 2019. 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, 2019, as filed with the Securities and Exchange Commission on April 13, 2020. Principles of Consolidation The condensed consolidated financial statements include the accounts of Teligent, Inc. and its wholly owned and majority-owned subsidiaries. The Company consolidated the following entities: Igen, Inc., Teligent Pharma. Inc., Teligent Luxembourg S.à.r.l., Teligent OÜ, and Teligent Canada Inc., in addition to the following inactive entities: Microburst Energy, Inc., Blood Cells, Inc. and Flavorsome, Ltd. All inter-company accounts and transactions have been eliminated.
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 the valuation of derivative liabilities associated with certain Notes and the Senior Credit Facility, 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), property, plant and equipment and legal accruals for environmental cleanup and remediation costs. The Company bases its estimates and assumptions on historical experience, known or expected trends and various other assumptions that it believes to be reasonable. As future events and their effects cannot be determined with precision, actual results could differ significantly from these 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, 2020 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 Issued Not Yet Adopted Accounting Pronouncements In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU No. 2020-04”). The update provides optional guidance for a limited period to ease the potential burden in accounting for (or recognizing the effects of) contract modifications on financial reporting caused by reference rate reform. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022. The Company is evaluating the impact upon adoption of the update on its Condensed Consolidated Financial Statements and related disclosures. In December 2019, the FASB issued an accounting standard update to simplify the accounting for income taxes. The standard’s amendments include changes in various subtopics of accounting for income taxes including, but not limited to, accounting for “hybrid” tax regimes, tax basis step-up in goodwill obtained in a transaction that is not a business combination, intraperiod tax allocation exception to an incremental approach, ownership changes in investments, interim-period accounting for enacted changes in tax law, and year-to-date loss limitation in interim-period tax accounting. The guidance is effective for fiscal years beginning after December 15, 2020 with early adoption permitted, including the interim periods within those years. The Company is evaluating the impact this guidance will have on the Company’s Condensed Consolidated Financial Statements and related disclosures. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”), which requires that a financial asset (or a group of financial assets) measured at an amortized cost basis be presented at the net amount expected to be collected. This approach to estimating credit losses applies to most financial assets measured at amortized cost and certain other instruments, including but not limited to, trade and other receivables. The amendments in this update are initially effective for public business entities for fiscal years beginning after December 15, 2019. The Financial Accounting Standards Board subsequently postponed the effective date for small reporting companies to January 2023, which for the Company means January 1, 2023. Based on the current status of the evaluation, the Company believes the adoption of the guidance will not have a material impact on its Condensed Consolidated Financial Statements and related disclosures. The Company expects to continue and finalize its evaluation and assessment as required by the guidance upon adoption.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2020

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, 2020 and 2019. 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, 2019, as filed with the Securities and Exchange Commission on April 13, 2020.

Principles of Consolidation

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

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 the valuation of derivative liabilities associated with certain Notes and the Senior Credit Facility, 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), property, plant and equipment and legal accruals for environmental cleanup and remediation costs. The Company bases its estimates and assumptions on historical experience, known or expected trends and various other assumptions that it believes to be reasonable. As future events and their effects cannot be determined with precision, actual results could differ significantly from these 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, 2020 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 Issued Not Yet Adopted Accounting Pronouncements

In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU No. 2020-04”). The update provides optional guidance for a limited period to ease the potential burden in accounting for (or recognizing the effects of) contract modifications on financial reporting caused by reference rate reform. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022. The Company is evaluating the impact upon adoption of the update on its Condensed Consolidated Financial Statements and related disclosures.

In December 2019, the FASB issued an accounting standard update to simplify the accounting for income taxes. The standard’s amendments include changes in various subtopics of accounting for income taxes including, but not limited to, accounting for “hybrid” tax regimes, tax basis step-up in goodwill obtained in a transaction that is not a business combination, intraperiod tax allocation exception to an incremental approach, ownership changes in investments, interim-period accounting for enacted changes in tax law, and year-to-date loss limitation in interim-period tax accounting. The guidance is effective for fiscal years beginning after December 15, 2020 with early adoption permitted, including the interim periods within those years. The Company is evaluating the impact this guidance will have on the Company’s Condensed Consolidated Financial Statements and related disclosures.

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU No. 2016-13”), which requires that a financial asset (or a group of financial assets) measured at an amortized cost basis be presented at the net amount expected to be collected. This approach to estimating credit losses applies to most financial assets measured at amortized cost and certain other instruments, including but not limited to, trade and other receivables. The amendments in this update are initially effective for public business entities for fiscal years beginning after December 15, 2019. The Financial Accounting Standards Board subsequently postponed the effective date for small reporting companies to January 2023, which for the Company means January 1, 2023. Based on the current status of the evaluation, the Company believes the adoption of the guidance will not have a material impact on its Condensed Consolidated Financial Statements and related disclosures. The Company expects to continue and finalize its evaluation and assessment as required by the guidance upon adoption.