v3.19.1
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2019
Apr. 22, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol usap  
Entity Registrant Name UNIVERSAL STAINLESS & ALLOY PRODUCTS INC  
Entity Central Index Key 0000931584  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   8,772,211