Basis of presentation (Policies)	6 Months Ended
Basis of presentation (Policies)	Jun. 30, 2022
Basis of presentation [Abstract]
Basis of Accounting	The accompanying unaudited financial statements of TransAct Technologies Incorporated (“TransAct”, the “Company”, “we”, “us”, or “our”) have been prepared in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP to be included in full year financial statements. In the opinion of management, all adjustments considered necessary for a fair statement of the results for the periods presented have been included. The December 31, 2021 Condensed Consolidated Balance Sheet data was derived from audited financial statements, but does not include all disclosures required by U.S. GAAP. These interim financial statements should be read in conjunction with the audited financial statements in our Annual Report on Form 10-K for the year ended December 31, 2021.
Foreign Currency Translation	The financial position and results of operations of our U.K. subsidiary are measured using the local currency as the functional currency. Assets and liabilities of such subsidiary have been translated at the end-of-period exchange rates, and related revenues and expenses have been translated at the exchange rate as of the date the transaction was recognized, with the resulting translation gain or loss recorded in “Accumulated other comprehensive income, net of tax” in the Condensed Consolidated Balance Sheets and “Accumulated other comprehensive income (loss)” in the Condensed Consolidated Statements of Changes in Shareholders’ Equity. Transaction gains and losses are included in “Other, net” in the Condensed Consolidated Statements of Operations.
Use of Assumptions and Estimates	Use of Assumptions and Estimates Management’s belief that the Company will be able to fund its planned operations over the 12 months following the date on which the Condensed Consolidated Financial Statements were issued is based on assumptions which involve significant judgment and estimates of future revenues, capital expenditures and other operating costs. Our current assumptions are that casinos and restaurants will remain open and consumer traffic will continue to increase during the balance of 2022, but that casinos and restaurants may delay purchases of new slot machines and our BOHA! products, respectively, due to labor shortages, supply issues and inflation caused by the COVID-19 pandemic. Based on these assumptions, we anticipate that sales in casino and gaming and food service technology may continue to be negatively impacted for the foreseeable future. We have performed a sensitivity analysis on these assumptions to forecast the potential impact of a slower-than-anticipated recovery and believe that we are positioned to withstand the impact of lower-than-anticipated sales and that we will be able to take additional financial and operational actions to cut costs and/or increase liquidity, if necessary. These actions may include additional expense reductions and capital raising activities. In addition, the presentation of the accompanying unaudited financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and the disclosure of contingent assets and liabilities. Our estimates include those related to revenue recognition, accounts receivable, inventory obsolescence, goodwill and intangible assets, the valuation of deferred tax assets and liabilities, depreciable lives of equipment, warranty obligations, share-based compensation and contingent liabilities. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances. Actual results could differ from those estimates used.