Document And Entity Information	9 Months Ended
	Sep. 30, 2012	Nov. 14, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	Sutron Corp
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		4,954,632
Amendment Flag	true
Amendment Description	We are filing this Amendment No. 1 on Form 10-Q/A to amend and restate in their entirety the following items of our Quarterly Report on Form 10-Q for the quarter ended September 30, 2012 as originally filed with the Securities and Exchange Commission on November 14, 2012 (the “Original Form 10-Q”): (i) Item 1 of Part I “Financial Information,” (ii) Item 2 of Part I, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” (iii) Item 4 of Part I, “Controls and Procedures,” and (iv) Item 6 of Part II, “Exhibits”, and we have also updated the signature page, the certifications of our Chief Executive Officer and Chief Financial Officer in Exhibits 31.1, 31.2, 32.1 and 32.2, and our financial statements formatted in Extensible Business Reporting Language (XBRL) in Exhibits 101. No other sections were affected, but for the convenience of the reader, this report on Form 10-Q/A restates in its entirety, as amended, our Original Form 10-Q. This report on Form 10-Q/A is presented as of the filing date of the Original Form 10-Q and does not reflect events occurring after that date, or modify or update disclosures in any way other than as required to reflect the restatement described below. The restatement relates to an error in the calculation of revenue on a fixed price contract which used the percentage of completion method for recognizing revenue and profits. Under the percentage of completion method, revenue and profits are recorded as costs are incurred based on the total sales value and estimated costs at completion. There was an error in the calculation of estimated costs to complete the contract resulting in estimated costs at completion being understated and revenue being overstated. The condensed consolidated statement of operations and comprehensive income for the quarter ended September 30, 2012 included in this Form 10-Q/A have been restated to decrease revenue in the amount of $236,943 from $7,278,999 to $7,042,056 and to decrease net income in the amount of $134,943 from $625,395 to $490,452. The condensed consolidated statement of operations and comprehensive income for the nine months ended September 30, 2012 have been restated to decrease revenue in the amount of $236,943 from $17,820,348 to $17,583,405 and to decrease net income in the amount of $134,943 from $1,100,956 to $966,013. These adjustments affect previously reported total retained earnings and operating cash flows and the consolidated balance sheets and consolidated statements of cash flows have been restated accordingly. We have made necessary conforming changes in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” resulting from the correction of this error.
Entity Central Index Key	0000728331
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q3