Create a "declining" coupon

I'm wondering if/how it would be possible to create a declining coupon. By "declining coupon" I mean that when a user spends some of the coupon, it subtracts it from the total value of the coupon.

For example:

I create a $500 coupon for Joe. Joe buys a product that costs exactly $100 and uses his coupon. Joe gets the product for free and his coupon now has a value of $400.

Is this a possibility with HikaShop Starter?