Quarterly report pursuant to Section 13 or 15(d)


Cover - shares
3 Months Ended
Jun. 30, 2021
Aug. 13, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2021  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2022  
Current Fiscal Year End Date --03-31  
Entity File Number 001-33216  
Entity Central Index Key 0001367083  
Entity Tax Identification Number 68-0423298  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 645 Molly Lane  
Entity Address, Address Line Two Suite 150  
Entity Address, City or Town Woodstock  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30189  
City Area Code (800)  
Local Phone Number 759-9305  
Title of 12(b) Security Common Stock, $0.0001 par value  
Trading Symbol SNOA  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   2,092,392